Document:

PURCHASE AGREEMENT
                Children's World Learning Center
                         Lenexa, Kansas

This AGREEMENT, entered into effective as of the 24th day of May,
2006 (the "Effective Date").

l.    PARTIES.  Seller  is  AEI Real Estate  Fund  XVIII  Limited
Partnership  which  owns an undivided 100% interest  in  the  fee
simple  title to that certain real property legally described  in
the attached Exhibit "A" (the "Property"). Buyer is Shamrock Real
Estate  #1, Inc.  Seller wishes to sell and Buyer wishes  to  buy
the Property.

2.    PROPERTY.  The  Property  to  be  sold  to  Buyer  in  this
transaction  consists of an undivided 100% interest the  Property
located at 8555 Monrovia, Lenexa, KS, including Seller's interest
in  all  buildings  and  improvements thereon.   Seller  owns  no
interest in any personalty in connection with the Property.

3.   PURCHASE PRICE. The purchase price for this 100% interest in
the Property is $900,000, all cash.

4.    TERMS. The purchase price for the Property will be paid  by
Buyer as follows:

(A).  When this agreement is executed, Buyer will pay $25,000  to
Seller  (which  shall be deposited into escrow according  to  the
terms  hereof) (the "First Payment"). The First Payment  will  be
credited against the purchase price when and if escrow closes and
the sale is completed.

(B).  Buyer  will  deposit the balance  of  the  purchase  price,
$875,000 (the Second Payment") prior to closing.

5.   CLOSING DATE. Escrow shall close on or before July 31, 2006.

6.    DUE  DILIGENCE. Buyer will have 60 days from the  Effective
Date  of this Agreement (the "Review Period") to conduct  all  of
its  inspections  and due diligence and satisfy itself  regarding
the  Property and this transaction. Buyer agrees to indemnify and
hold  Seller  harmless for any loss or damage to the Property  or
persons  caused  by  Buyer  or its agents  arising  out  of  such
physical  inspections of the Property.  Within ten  days  of  the
Effective Date of this Agreement, Seller shall provide (except as
explained below, in Item A):

A.    One  copy  of a title insurance commitment for  an  Owner's
Title insurance policy (see paragraph 8 below), to be ordered  by
Seller immediately upon both parties hereto having executed  this
agreement, and  said commitment to be delivered to Buyer as  soon
as the third party title insurance company provides it to Seller.

B.    A copy of a Certificate of Occupancy or other such document
certifying  completion  and  granting permission  to  permanently
occupy  the  improvements  on the Property  as  are  in  Seller's
possession.

C.    A  copy  of an "as built" survey of the Property  completed
concurrent   with  Seller's  acquisition  of  the  Property,   if
available in Seller's possession.

D.    A copy of any Phase I Environmental Report on the Property,
if available in Seller's possession.

E.    Lease,  and  any  amendments or modifications  thereto  (as
further  set  forth  in paragraph 11(A) below)  of  the  Property
showing   occupancy  date,  lease  expiration  date,  rent,   and
Guarantees,   if  any,  accompanied  by  such  tenant   financial
statements as may have been provided most recently to  Seller  by
the Tenant and/or Guarantors.

F.    Seller shall use its best efforts to execute a one (1) year
lease extension with Children's World that is mutually acceptable
to  both  Buyer and Seller.  Buyer will have seven (7) days  from
the  time they receive the final terms and conditions of the  one
(1)  year lease extension to accept or reject the offer. If  said
lease  extension is not acceptable to the Buyer for  any  reason,
then  Buyer  shall,  within the seven (7) day period,  submit  to
Seller  in  writing  a letter canceling this agreement.  If  said
lease  extension  is acceptable to the Buyer, then  Buyer  shall,
within  the seven (7) day period, submit to Seller in  writing  a
letter  referencing their approval. Buyer's acceptance in writing
to  the  terms  and  conditions  of  the  lease  extension  shall
immediately  waive this condition. If Buyer does not  respond  to
Seller  within the seven (7) day period then this condition  will
be waived.

Buyer  may  cancel  this agreement for ANY  REASON  in  its  sole
discretion  by  delivering a cancellation notice, return  receipt
requested,  to Seller and escrow holder before the expiration  of
the  Review  Period. Such notice shall be deemed  effective  only
upon receipt by Seller. If this Agreement is not cancelled as set
forth  above,  the  First Payment shall be non-refundable  unless
Seller shall default hereunder.

If  Buyer cancels this Agreement as permitted under this Section,
except for any escrow cancellation fees and any liabilities under
the  first  paragraph of section 6 of this Agreement (which  will
survive),  Seller  (after execution of such documents  reasonably
requested  by  Seller to evidence the termination  hereof)  shall
return  to Buyer its First Payment and Buyer will have absolutely
no  rights, claims or interest of any type in connection with the
Property  or this transaction, regardless of any alleged  conduct
by Seller or anyone else.

Unless this Agreement is canceled by Buyer pursuant to the  terms
hereof, if Buyer fails to make the Second Payment Seller shall be
entitled  to retain the First Payment and Buyer irrevocably  will
be deemed to be in default under this Agreement. Seller then may,
at  its  option,  retain  the  First  Payment  and  declare  this
Agreement  null and void, in which event Buyer will be deemed  to
have canceled this Agreement and relinquish all rights in and  to
the Property, or Seller may exercise its rights under Section  14
hereof.  If this Agreement is not canceled and the First  Payment
and  the  Second  Payment is made when required, all  of  Buyer's
conditions and contingencies will be deemed satisfied.

7.    ESCROW. Escrow shall be opened by Seller and the funds will
be  deposited in escrow upon acceptance of this Agreement by both
parties. The escrow holder will be a nationally-recognized escrow
company  selected  by Seller. A copy of this  Agreement  will  be
delivered  to  the  escrow  holder  and  will  serve  as   escrow
instructions   together   with  the  escrow   holder's   standard
instructions  and  any additional instructions  required  by  the
escrow  holder to clarify its rights and duties (and the  parties
agree  to  sign these additional instructions). If there  is  any
conflict  between  these other instructions and  this  Agreement,
this Agreement will control.

8.    TITLE.  Closing will be conditioned on the agreement  of  a
national  title  company selected by Seller to issue  an  Owner's
policy of title insurance, dated as of the close of escrow, in an
amount equal to the purchase price, insuring that Buyer will  own
insurable and marketable fee simple title to the Property subject
only  to:  the title company's standard exceptions; current  real
property taxes and assessments; survey exceptions; the rights  of
parties  in possession pursuant to the lease defined in paragraph
11 below; all matters of public record; and other items disclosed
to Buyer during the Review Period.

Buyer shall be allowed twenty (20) business days after receipt of
said  commitment for examination and the making of any objections
to  marketability thereto, said objections to be made in  writing
or  deemed waived. If any objections are so made, Seller shall be
allowed  thirty (30) days to cure such objections and  make  such
title  marketable or, in the alternative, to obtain a  commitment
for  insurable title insuring over Buyer's objections. If  Seller
shall  decide to make no efforts to make title marketable, or  is
unable to make title marketable or obtain insurable title, (after
execution  by  Buyer  of such documents reasonably  requested  by
Seller  to evidence the termination hereof) Buyer's First Payment
will be returned and this Agreement shall be null and void and of
no  further force and effect. Seller has no obligation  to  spend
any  funds  or make any effort to satisfy Buyer's objections,  if
any.

Pending   satisfaction  of  Buyer's  objections,   the   payments
hereunder  required shall be postponed, but upon satisfaction  of
Buyer's objections and within ten (10) days after written  notice
to  the  Buyer of satisfaction of Buyer's objections, the parties
shall perform this Agreement according to its terms.

9.    CLOSING COSTS. Seller will pay one-half of escrow fees  and
one-half  of the Mortgage Registration Tax. Seller will  pay  the
cost of obtaining a Standard Owners Title Insurance Policy in the
full amount of the purchase price. Buyer will pay one-half of the
escrow  fees,  one-half  of the Mortgage  Registration  Tax,  the
recording fees, the cost of the title commitment and the cost  of
an  update  to the Survey in Sellers possession (if an update  is
required  by  Buyer). Seller will pay 3% of  the  sale  price  at
closing  as  a  brokerage  commission to  Colliers  Truly  Martin
Tucker. Each party will pay its own attorney's fees and costs  to
document and close this transaction.

10.  REAL ESTATE TAXES, SPECIAL ASSESSMENTS AND PRORATIONS.

(A).       Because  the Property is subject to a  net  lease  (as
further set forth in paragraph 11(A)(1)), the parties acknowledge
that  there  shall  be no need for a real estate  tax  proration.
However,   Seller  warrants  that  all  real  estate  taxes   and
installments of special assessments due and payable in all  years
prior to the year of Closing have been paid in full. Unpaid  real
estate  taxes  and unpaid levied and pending special  assessments
existing  on  the date of Closing shall be the responsibility  of
Buyer,  pro-rated, however, to the date of closing for the period
prior to closing, which shall be the responsibility of Seller  if
Tenant shall not pay the same. Buyer shall likewise pay all taxes
due  and  payable  in  the  year after  Closing  and  any  unpaid
installments   of  special  assessments  payable  therewith   and
thereafter, if such unpaid levied and pending special assessments
and real estate taxes are not paid by any tenant of the Property.

(B). All income and all operating expenses from the Property,  if
any,  shall be prorated between the parties and adjusted by  them
as of the date of Closing. Seller shall be entitled to all income
earned, and shall be responsible for all expenses incurred, prior
to  the  date of Closing. Buyer shall be entitled to  all  income
earned and shall be responsible for all operating expenses of the
Property incurred on and after the date of closing.

11.  SELLER'S REPRESENTATION AND AGREEMENTS.

(A). Seller represents and warrants as of this date that:

1.   Except for the Lease Agreement in existence between AEI Real
Estate  Fund  XVIII Limited Partnership, whose corporate  general
partner  is  AEI  Fund  Management  XVIII,  Inc.  ("Lessor")  and
KinderCare Learning Centers, Inc. ("Lessee"), dated September 13,
1990,  the First Amendment to Net Lease Agreement dated July  30,
2004, the Second Amendment to Net Lease Agreement dated July  20,
2005,  and the Certificate of Merger dated November 1, 2005  (the
"Lease"), Seller is not aware of any leases of the Property.

2.    If  the  Lease  contains a Right of First  Refusal  to  the
benefit  of  the Lessee for the duration of the Lease,  including
any  renewal  terms,  then  Seller's  obligations  hereunder  are
contingent upon Seller successfully obtaining Lessee's waiver  of
such right of first refusal with respect to this transaction.

3.    It  is  not aware of any pending litigation or condemnation
proceedings  against  the Property or Seller's  interest  in  the
Property.

4.    Except as previously disclosed to Buyer and as permitted in
paragraph (B) below, Seller is not aware of any contracts  Seller
has  executed that would be binding on Seller after  the  closing
date.

(B).  Provided that Buyer performs its obligations  as  required,
Seller agrees that it will not enter into any new contracts  that
would  materially  affect the Property and be binding  on  Seller
after the Closing Date without Buyer's prior consent, which  will
not be unreasonably withheld.

12.  DISCLOSURES.

(A).  Seller  has  not  received  any  notice  of  any  material,
physical,  or  mechanical  defects  of  the  Property,  including
without limitation, the plumbing, heating, air conditioning,  and
ventilating, electrical system. To the best of Seller's knowledge
without  inquiry, all such items are in good operating  condition
and  repair  and in compliance with all applicable  governmental,
zoning,   and   land  use  laws,  ordinances,   regulations   and
requirements. If Seller shall receive any notice to the  contrary
prior to Closing, Seller will inform Buyer prior to Closing.

(B).  Seller  has  not  received any  notice  that  the  use  and
operation  of  the  Property  is  not  in  full  compliance  with
applicable  building codes, safety, fire, zoning,  and  land  use
laws,  and  other  applicable  local,  state  and  federal  laws,
ordinances, regulations and requirements. If Seller shall receive
any  such notice prior to Closing, Seller will inform Buyer prior
to Closing.

(C).  Seller knows of no facts, nor has Seller failed to disclose
to Buyer any fact known to Seller, which would prevent the Tenant
from  using and operating the Property after the Closing  in  the
manner in which the Property has been used and operated prior  to
the date of this Agreement. If Seller shall receive any notice to
the contrary prior to Closing, Seller will inform Buyer prior  to
Closing.

(D).  Seller has not received any notice that the Property is  in
violation  of  any  federal, state or local  law,  ordinance,  or
regulations  relating to industrial hygiene or the  environmental
conditions on, under, or about the Property, including,  but  not
limited  to,  soil, and groundwater conditions. To  the  best  of
Seller's  knowledge, there is no proceeding  or  inquiry  by  any
governmental authority with respect to the presence of  Hazardous
Materials on the Property or the migration of Hazardous Materials
from or to other property. Buyer agrees that Seller will have  no
liability of any type to Buyer or Buyer's successors, assigns, or
affiliates in connection with any Hazardous Materials  on  or  in
connection  with the Property either before or after the  Closing
Date,  except  such Hazardous Materials on or in connection  with
the  Property  arising  out  of  Seller's  gross  negligence   or
intentional misconduct. If Seller shall receive any notice to the
contrary  prior  to Closing, Seller will inform  Buyer  prior  to
Closing.

(E). BUYER AGREES THAT IT SHALL BE PURCHASING THE PROPERTY IN ITS
PRESENT  CONDITION,  "AS  IS,    WHERE IS",  AND  SELLER  HAS  NO
OBLIGATIONS TO CONSTRUCT OR REPAIR ANY IMPROVEMENTS THEREON OR TO
PERFORM ANY OTHER ACT REGARDING THE PROPERTY, EXCEPT AS EXPRESSLY
PROVIDED HEREIN.

(F).  BUYER  ACKNOWLEDGES THAT, HAVING BEEN GIVEN THE OPPORTUNITY
TO INSPECT THE PROPERTY AND SUCH FINANCIAL INFORMATION CONCERNING
THE  LESSEE  AND  ANY GUARANTORS OF THE LEASE  AS  BUYER  OR  ITS
ADVISORS  SHALL  REQUEST  AND AS MAY BE IN  SELLER'S  POSSESSION,
BUYER  IS RELYING SOLELY ON ITS OWN INVESTIGATION OF THE PROPERTY
AND  NOT ON ANY REPRESENTATIONS OR INFORMATION PROVIDED BY SELLER
OR  TO  BE PROVIDED BY SELLER, EXCEPT AS SET FORTH HEREIN.  BUYER
FURTHER  ACKNOWLEDGES THAT THE INFORMATION  PROVIDED,  OR  TO  BE
PROVIDED,  BY  SELLER WITH RESPECT TO THE PROPERTY, THE  PROPERTY
AND  TO THE LESSEE AND ANY GUARANTORS OF LEASE, WAS OBTAINED FROM
A  VARIETY  OF  SOURCES AND SELLER HAS NOT (A)  MADE  INDEPENDENT
INVESTIGATION OR VERIFICATION OF SUCH INFORMATION, AND (B)  MAKES
NO  REPRESENTATIONS  AS TO THE ACCURACY OR COMPLETENESS  OF  SUCH
INFORMATION, EXCEPT AS HEREIN SET FORTH. THE SALE OF THE PROPERTY
AS PROVIDED FOR HEREIN IS MADE ON AN "AS IS - WHERE IS" BASIS AND
BUYER  EXPRESSLY  ACKNOWLEDGES  THAT,  IN  CONSIDERATION  OF  THE
AGREEMENTS OF SELLER HEREIN, EXCEPT AS OTHERWISE SPECIFIED HEREIN
IN  PARAGRAPH 11(A) AND (B) ABOVE AND THIS PARAGRAPH  12,  SELLER
MAKES  NO  WARRANTY  OR REPRESENTATION, EXPRESS  OR  IMPLIED,  OR
ARISING  BY OPERATION OF LAW, INCLUDING, BUT NOT LIMITED TO,  ANY
WARRANTY  OF  CONDITION,  HABITABILITY,  SUITABILITY  FOR  LEASE,
SUITABILITY FOR COMMERCIAL PURPOSES, MERCHANTABILITY, OR  FITNESS
FOR  A  PARTICULAR  PURPOSE, IN RESPECT OF THE  PROPERTY.  SELLER
MAKES NO REPRESENTATIONS OF ANY SORT THAT OWNERSHIP OF THE ENTIRE
PROPERTY WILL RESULT IN A PROFIT TO ANY BUYER.

(G)   BUYER  ACKNOWLEDGES THAT SELLER CANNOT, AND DOES NOT,  MAKE
ANY REPRESENTATION AS TO (A) THE SUCCESS, OR LACK THEREOF, OF THE
ENTIRE  PROPERTY, (B) THE LESSEE AND ANY GUARANTORS OF THE  LEASE
OR  THEIR ABILITY TO FULFILL THEIR LEASE OBLIGATIONS, OR (C)  THE
APPROPRIATENESS OF PURCHASING THE ENTIRE PROPERTY FOR THE BUYER'S
INDIVIDUAL  TAX  OR  FINANCIAL  SITUATION  OR  TAX  OR  FINANCIAL
OBJECTIVES.  BUYER ACKNOWLEDGES THAT HE OR SHE IS RELYING  SOLELY
UPON  HIS OR HER OWN EXAMINATION OF THE ENTIRE PROPERTY  AND  ALL
FACTS  SURROUNDING THE PURCHASE OF THE ENTIRE PROPERTY  INCLUDING
THE MERITS AND RISKS INVOLVED THEREIN.

The provisions (D) - (G) above shall survive Closing.

13.  Closing.

(A). Before the closing date, Seller will deposit into escrow  an
executed  special warranty deed warranting title  against  lawful
claims  by,  through,  or  under a conveyance  from  Seller,  and
conveying  insurable  and  marketable fee  simple  title  of  the
Property  to  Buyer,  subject  to  the  exceptions  contained  in
paragraph   8  above.  Seller  will  also  deliver  an   Estoppel
Certificate certified by Seller (or if available, by  Lessee)  as
to  the absence of known defaults by Lessee and Lessor under  the
Lease

(B).  On  or  before  the closing date, Buyer will  deposit  into
escrow  the  balance  of the Purchase Price when  required  under
Section 4 and any additional funds required of Buyer (pursuant to
this agreement or any other agreement executed by Buyer) to close
escrow. Both parties will deliver to the escrow holder any  other
documents  reasonably  required by the  escrow  holder  to  close
escrow.

(C). On the closing date, if escrow is ready to close, the escrow
holder  will:  record  the deed in the official  records  of  the
county where the Property is located; cause the title company  to
commit  to issue the title policy; immediately deliver to  Seller
the  portion  of  the  purchase price deposited  into  escrow  by
cashier's check or wire transfer (less debits and prorations,  if
any);  deliver  to Seller and Buyer a signed counterpart  of  the
escrow  holder's certified closing statement and take  all  other
actions necessary to close escrow.

14.   DEFAULTS. If Buyer defaults, Buyer will forfeit all  rights
and  claims  and  Seller will be relieved of all obligations  and
will  be  entitled to retain all monies heretofore  paid  by  the
Buyer, except as otherwise
provided herein.

If  Seller shall default, Buyer irrevocably waives any rights  to
file  a  lis pendens, a specific performance action or any  other
claim,  action or proceeding of any type in connection  with  the
Property or this or any other transaction involving the Property,
and  will  not  do  anything to affect title to the  Property  or
hinder,  delay  or  prevent  any  other  sale,  lease  or   other
transaction involving the Property (any and all of which will  be
null  and void), unless: it has paid the First Payment, deposited
the  balance  of the Second Payment for the Purchase  Price  into
escrow, performed all of its other obligations and satisfied  all
conditions  under  this  Agreement, and unconditionally  notified
Seller  that it stands ready to tender full performance, purchase
the  Property  and close escrow as per this Agreement.  Provided,
however, that in no event shall Seller be liable for any  actual,
punitive, consequential or speculative damages arising out of any
default by Seller hereunder.

15.  BUYER'S REPRESENTATIONS AND WARRANTIES.

(A). Buyer represents and warrants to Seller as follows:

(1).  In  addition  to  the  acts and deeds  recited  herein  and
contemplated to be performed, executed, and delivered  by  Buyer,
Buyer  shall  perform,  execute  and  deliver  or  cause  to   be
performed,  executed, and delivered at the Closing or  after  the
Closing, any and all further acts, deeds and assurances as Seller
or  the  Title Company may require and be reasonable in order  to
consummate the transactions contemplated herein.

(2).  Buyer  has all requisite power and authority to  consummate
the  transaction contemplated by this Agreement and has by proper
proceedings  duly authorized the execution and delivery  of  this
Agreement  and  the consummation of the transaction  contemplated
hereby.

(3). To Buyer's knowledge, neither the execution and delivery  of
this   Agreement   nor  the  consummation  of   the   transaction
contemplated hereby will violate or be in conflict with  (a)  any
applicable provisions of law, (b) any order of any court or other
agency  of  government having jurisdiction  hereof,  or  (c)  any
agreement  or instrument to which Buyer is a party  or  by  which
Buyer is bound.

16.  DAMAGES, DESTRUCTION AND EMINENT DOMAIN.

(A).  If,  prior to closing, the Property or any part thereof  be
destroyed or further damaged by fire, the elements, or any cause,
due  to events occurring subsequent to the date of this Agreement
to  the  extent that the cost of repair exceeds $10,000.00,  this
Agreement   shall  become  null  and  void,  at  Buyer's   option
exercised, if at all, by written notice to Seller within ten (10)
days  after Buyer has received written notice from Seller of said
destruction or damage. Seller, however, shall have the  right  to
adjust or settle any insured loss until (i) all contingencies set
forth  in Paragraph 6 hereof have been satisfied, or waived;  and
(ii)  any  ten-day period provided for above in this Subparagraph
16a for Buyer to elect to terminate this Agreement has expired or
Buyer  has, by written notice to Seller, waived Buyer's right  to
terminate  this  Agreement. If Buyer elects  to  proceed  and  to
consummate the purchase despite said damage or destruction, there
shall be no reduction in or abatement of the purchase price,  and
Seller  shall  assign  to Buyer the Seller's  right,  title,  and
interest  in and to all insurance proceeds (pro-rata in  relation
to the Property) resulting from said damage or destruction to the
extent  that the same are payable with respect to damage  to  the
Property, subject to rights of any Tenant of the Property.

If  the  cost of repair is less than $10,000.00, Buyer  shall  be
obligated to otherwise perform hereinunder with no adjustment  to
the  Purchase  Price, reduction or abatement,  and  Seller  shall
assign Seller's right, title and interest in and to all insurance
proceeds pro-rata in relation to the Property, subject to  rights
of any Tenant of the Property.

(B). If, prior to closing, the Property, or any part thereof,  is
taken  by  eminent domain, this Agreement shall become  null  and
void  at Buyer's option. If Buyer elects to proceed to consummate
the purchase despite said taking, there shall be no reduction in,
or  abatement of, the purchase price, and Seller shall assign  to
Buyer the Seller's right, title, and interest in and to any award
made,  or to be made, in the condemnation proceeding pro-rata  in
relation to the Property, subject to rights of any Tenant of  the
Property.

In  the  event  that  this Agreement is terminated  by  Buyer  as
provided  above  in  Subparagraph 16A or 16B, the  First  Payment
shall  be immediately returned to Buyer (after execution by Buyer
of  such documents reasonably requested by Seller to evidence the
termination hereof.)

17.  CANCELLATION

If any party elects to cancel this Contract because of any breach
by  another party or because escrow fails to close by the  agreed
date,  the party electing to cancel shall deliver to escrow agent
a  notice  containing  the address of the  party  in  breach  and
stating  that this Contract shall be cancelled unless the  breach
is  cured within 13 days following the delivery of the notice  to
the escrow agent. Within three days after receipt of such notice,
the escrow agent shall send it by United States Mail to the party
in  breach at the address contained in the Notice and no  further
notice  shall be required. If the breach is not cured within  the
13 days following the delivery of the notice to the escrow agent,
this Contract shall be cancelled.

18.  MISCELLANEOUS.

(A).  This  Agreement  may be amended only by  written  agreement
signed  by  both  Seller and Buyer and all  waivers  must  be  in
writing  and signed by the waiving party. Time is of the essence.
This  Agreement  will not be construed for  or  against  a  party
whether or not that party has drafted this Agreement. If there is
any  action  or proceeding between the parties relating  to  this
Agreement  the  prevailing  party will  be  entitled  to  recover
attorney's  fees  and  costs.  This is  an  integrated  agreement
containing  all agreements of the parties about the Property  and
the   other  matters  described  and  it  supersedes  any   other
agreements or understandings. Exhibits attached to this Agreement
are incorporated into this Agreement.

(B).  Funds  to be deposited or paid by Buyer must  be  good  and
clear  funds  in  the  form  of cash, cashier's  checks  or  wire
transfers.

(C).  All notices from either of the parties hereto to the  other
shall  be  in writing and shall be considered to have  been  duly
given  or  served if sent by first class certified  mail,  return
receipt requested, postage prepaid, or by a nationally recognized
courier  service guaranteeing overnight delivery to the party  at
his  or its address set forth below, or to such other address  as
such party may hereafter designate by written notice to the other
party.

If to Seller:                                If to Buyer:

AEI Fund Management Inc                      Shamrock Real Estate #1
Attention: Robert Johnson                    Attn: John Buchanan
30 East Seventh Street, #1300                8601 Monrovia
St. Paul, MN 55101                           Lenexa, Ks  66125

If to Buyer:

Buck Buchnan
Shamrock Real Estate #1, Inc.
8601 Monrovia
Lenexa, KS  66215

When  accepted, this offer will be a binding agreement for  valid
and  sufficient consideration which will bind and benefit  Buyer,
Seller  and  their  respective successors and assigns.  Buyer  is
submitting  this  offer  by signing a  copy  of  this  offer  and
delivering it to Seller. Seller has five (5) business  days  from
receipt within which to accept this offer.

This   Agreement  shall  be  governed  by,  and  interpreted   in
accordance with, the laws of the State of Kansas.

IN  WITNESS  WHEREOF,  the Seller and Buyer  have  executed  this
Agreement effective as of the day and year above first written.

BUYER:

Shamrock Real Estate #1, Inc.

By: /s/ John F Buchanan       5/22/06
        John F Buchanan Chief Financial Officer

SELLER:

AEI Real Estate Fund XVIII Limited Partnership

By: /s/ Robert P Johnson
        Robert P. Johnson, its President

                            EXHIBIT A

                        Legal Description

A  tract of land located in the Southeast Quarter of Section  27,
Township  12 South, Range 24 East in the City of Lenexa,  Johnson
County, Kansas, more particularly described as follows:

Commencing  at the Southeast corner of the Southeast  Quarter  of
said  Section  27;  thence Westerly on the  South  line  of  said
section  a  distance  of 513.70 feet to the intersection  of  the
centerline of  Earnshaw Street, as now established; thence  North
00  degrees  03  minutes 25 seconds East  on  said  centerline  a
distance of 412.11 feet; thence continuing on said centerline  on
a  curve to the left, having a radius of 572.96 feet and  an  arc
length  of  66.74  feet; thence South 83 degrees  23  minutes  00
seconds  West a distance of 30.00 feet to a point on the Westerly
right-of-way line of said Earnshaw Street, said point also  being
the  point  of  beginning of the tract of land to  be  described;
thence North 89 degrees 56 minutes 35 seconds West a distance  of
130.00 feet; thence North 22 degrees 08 minutes 41 seconds West a
distance  of 173.63 feet; thence South 66 degrees 14  minutes  30
seconds West a distance of 55.85 feet; thence North 14 degrees 46
minutes  54 seconds West a distance of 81.10 feet to a  point  on
the  Southerly  right-of-way  line of  Monrovia  Street,  as  now
established; thence on a curve to the left, nontangent,  with  an
initial tangent bearing of North 79 degrees 09 minutes 34 seconds
East,  having a radius of 439.26 feet and an arc length of 164.62
feet  to  the intersection of the Westerly right-of-way  line  of
said  Earnshaw  Street;  thence South 36 degrees  13  minutes  43
seconds  East  on said Westerly right-of-way line a  distance  of
23.21 feet; thence continuing on said Westerly right-of-way  line
on  a  curve  to  the right tangent to the last described  course
having  a radius of 542.96 feet and an arc length of 280.61  feet
to the point of beginning.Exhibit 4.50

    Exhibit
      4.50

     

    FIRST
      SUPPLEMENT TO INDENTURE

     

    This
      First Supplement to Indenture (the "First
      Supplement")
      is
      dated as of August 9, 2006 by and among Navistar International Corporation,
      a Delaware corporation (the "Company"),
      International Truck and Engine Corporation, a Delaware corporation
      ("International")
      and
      BNY Midwest Trust Company, an Illinois banking company (the "Trustee"),
      with
      respect to the Company's 2.50% Senior Convertible Notes due 2007 (the
      "Notes").
      Capitalized terms used but not otherwise defined in this First Supplement shall
      have the meanings ascribed to such terms in the Indenture (hereinafter defined).
      

     

    WHEREAS,
      the Company, International and the Trustee entered into that certain Indenture,
      dated as of December 16, 2002 (as may be amended and supplemented from time
      to
      time in accordance with its terms, the "Indenture");
      

     

    WHEREAS,
      the Company desires to amend and waive certain provisions of the Indenture,
      as
      set forth in Article
      I
      hereof;

     

    WHEREAS,
      the Holders of at least a majority in aggregate principal amount of Notes
      outstanding (excluding any Notes held by any affiliate of the Company) have
      consented to the amendments and waivers effected by this First Supplement;
      

     

    WHEREAS,
      pursuant to Section
      8.02
      of the
      Indenture, the Trustee is authorized to execute and deliver this First
      Supplement; 

     

    NOW,
      THEREFORE, in consideration of the premises and for other good and valuable
      consideration, the receipt and sufficiency of which are hereby acknowledged,
      the
      parties hereby agree, for the equal and proportionate benefit of all Holders
      of
      the Securities, as follows: 

     

    ARTICLE
      I

     

    INDENTURE
      AMENDMENTS AND WAIVERS

     

    Section
      1.01 Amendments
      to Articles Three, Four, Five and Six.
      Upon
      written notification to the Trustee by the Company that it has accepted for
      purchase and payment (the "Acceptance
      Date")
      pursuant to the offer to purchase all of the Notes validly tendered on or before
      midnight, New York City time, on August 8, 2006 pursuant to the Offer to
      Purchase and Consent Solicitation Statement, dated as of June 27, 2006, and
      any
      amendments, modifications or supplements thereto, then automatically (without
      further act by any person) with respect to the Notes: 

     

    (a) Section
      3.02
      (Reports
      by the Company) and Section
      3.03
      (Compliance Certificate) of the Indenture are deleted in their entirety and
      replaced with the following: "The Company shall comply with Section 314 of
      the
      TIA." 

     

    E-1

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    Exhibit
      4.50 (Continued)

     

    

     

    (b) Section
      3.06
      (Repurchase Upon Fundamental Change) of the Indenture is deleted in its
      entirety. 

     

    (c) Section
      3.11
      (Limitation on Guarantees by Subsidiaries) of the Indenture is deleted in its
      entirety. 

     

    (d) Each
      of
      the following subsections of Section
      5.01
      (Events
      of Default) of the Indenture are deleted in their entirety: Sections
      5.01(c),
      (d),
      (e)
      and
(h).
      

     

    (e) Failure
      to comply with the terms of any of the foregoing sections of the Indenture
      shall
      no longer constitute a Default or an Event of Default under the Indenture and
      shall no longer have any other consequence under the Indenture.

     

    (f) The
      occurrence of the events described in Sections
      5.01(c),
      (d),
      (e)
      and
(h)
      shall no
      longer constitute Events of Default.

     

    (g) All
      definitions set forth in Section
      1.01
      of the
      Indenture that relate to defined terms used solely in covenants or sections
      deleted hereby are deleted in their entirety. 

     

    Section
      1.02 Waivers.
      The
      Trustee acknowledges that Holders representing at least a majority in aggregate
      principal amount of the outstanding Notes have: (i) waived any and all
      Defaults or Events of Default that have arisen or may arise under the Indenture
      at any time prior to the maturity date of the Notes, including any Default
      or
      Event of Default that may exist or arise as a result of: (a) a failure by
      the Company to comply with Section
      3.02
      of the
      Indenture at any time prior to the maturity date of the Notes; (b) a
      failure by the Company to provide the Trustee with any notice of Default or
      Event of Default required by Section
      3.03
      of the
      Indenture at any time prior to the maturity date of the Notes and (c) an
      acceleration of any Indebtedness or other event constituting a Default or Event
      of Default under Section
      5.01(h)
      of the
      Indenture; (ii) agreed to rescind any notice of Default provided to the
      Company at any time prior to the effective time of this Section
      1.02;
      and
      (iii) agreed to rescind any notice of acceleration of the Notes that has
      been received by the Company at any time prior to the effective time of this
      Section
      1.02.
      Based
      on the foregoing, the Trustee hereby revokes any and all notices of Default
      and/or acceleration delivered by the Trustee to the Company prior to the
      effective time of this Section
      1.02.
      This
Section
      1.02
      shall be
      effective as of the Acceptance Date. 

     

    

     

    

     

    

     

    

     

    E-2

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    Exhibit
      4.50 (Continued)

     

    ARTICLE
      II

     

    MISCELLANEOUS
      PROVISIONS

     

    Section
      2.01 Instruments
      to be Read Together.
      This
      First Supplement is an indenture supplement to and in implementation of the
      Indenture, and said Indenture and this First Supplement shall henceforth be
      read
      together. 

     

    Section
      2.02 Confirmation.
      The
      Indenture, as amended and supplemented by this First Supplement, is in all
      respects confirmed and preserved. 

     

    Section
      2.03 Counterparts.
      This
      First Supplement may be executed in any number of counterparts, each of which,
      when so executed, shall be deemed to be an original, but all of which shall
      together constitute one and the same instrument. 

     

    Section
      2.04 Effectiveness.
      This
      First Supplement shall become effective immediately upon its execution in
      accordance with the provisions of Article
      IX
      of the
      Indenture. 

     

    Section
      2.05 GOVERNING
      LAW.
      THIS
      FIRST SUPPLEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE
      INTERNAL LAWS OF THE STATE OF NEW YORK. THE COMPANY AGREES TO SUBMIT TO THE
      JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK, COUNTY OF NEW YORK, IN
      ANY
      ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS FIRST SUPPLEMENT.

     

    Section
      2.06 Disclaimer
      of Trustee's Responsibility.
      In
      executing this First Supplement, the Trustee shall be entitled to all the
      privileges and immunities afforded to the Trustee under the terms and conditions
      of the Indenture. 

     

    Section
      2.07 Trust
      Indenture Act Controls.
      If any
      provision of this First Supplement limits, qualifies or conflicts with another
      provision that is required to be included in the First Supplement or the
      Indenture by the Trust Indenture Act, the required provision shall control.
      

     

    *
      * * *
      *

     

    

     

    

     

    

     

    

     

    

     

    E-3

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    Exhibit
      4.50 (Continued)

     

    

     

    

     

    IN
      WITNESS WHEREOF, the parties hereto have caused this First Supplement to
      Indenture to be duly executed and attested, all as of the day and year first
      written above. 

     

    

    

    

    
      	 	 	 
	 	NAVISTAR
              INTERNATIONAL CORPORATION
	 
 	 
 	 
 
	
            	By:  	/s/ Terry
              M. Endsley
	 	
              
Name: Terry
              M. Endsley 
	 	Title:   Vice
              President and Treasurer 

    

    
      	 	 	 
	 	INTERNATIONAL
              TRUCK AND ENGINE CORPORATION
	 
 	 
 	 
 
	
            	By:  	/s/ Terry
              M. Endsley
	 	
              
Name:
              Terry M. Endsley
	 	Title:   Vice
              President and Treasurer 

    

    
      	 	 	 
	 	BNY
              MIDWEST TRUST COMPANY
	 
 	 
 	 
 
	
            	By:  	/s/ Linda
              Garcia
	 	
              
Name:  Linda
              Garcia
	 	Title:  
              Assistant Vice President 

    

    

    

    

    E-4

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00108-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00108-of-00352.parquet"}]]