EXHIBIT 4.20

                           STOCK OPTION AGREEMENT

EFFECTIVE DATE:            March 31, 2001
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PLACE:                     Tempe, Arizona

PARTIES:                   RECONDITIONED SYSTEMS, INC., an Arizona corporation
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                           (the "Company"),  and Dirk D. Anderson ("Optionee")

RECTIALS:

        The Company desires to issue to Optionee options to acquire up to 2,500
shares of the  Company's no par value  common stock  ("Common  Stock").
Capitalized  terms not otherwise  defined herein shall have the same meaning as
ascribed  to  them in the  Employment  Agreement  between  the  Company  and the
Optionee dated August 10, 1995.

        AGREEMENTS:

        In consideration of the mutual promises herein contained, the parties
agree as follows:

                  1. Grant of Option.  The Company hereby irrevocably grants to
Optionee  the right and option (the "Option") to purchase all or any part of an
aggregate of up to two thousand five hundred shares (2,500) of Common Stock (the
"Shares") on the terms and conditions set forth in this Agreement.

                  2. Purchase Price.  The purchase price of the Shares
acquired pursuant to the exercise of an Option shall be Three  dollars and no
cents  ($3.00) per Share,  which is equal to or greater than the market value
per share on the effective date of this grant.  The purchase price shall be paid
in the manner set forth in Paragraph 11.

                  3. Vesting.  Optionee's right to acquire Shares pursuant to
the exercise of the Option as provided  herein shall be fully vested as of the
date hereof;  provided,  however,  that Optionee  hereby agrees not to sell,
assign, transfer,  pledge, hypothecate or otherwise dispose of any Shares
acquired upon exercise  of this  Option  for a period  of twelve  (12)  months
following  the Effective Date of this Option.

                  4. Term of Option.  Subject to earlier  termination  of the
Option as provided in  Paragraphs 7, 8 and 9 hereof, shall terminate as of the
date ten (10) years after the Effective Date of Grant.

                  5. Exercise of the Option.  Subject to earlier  termination of
the Option as  provided  in  Paragraphs  7, 8 and 9 hereof,  and to the  lock-up
provisions  contained  in  Paragraph 3 hereof,  Optionee may exercise the Option
from time to time as to any part or all of the Shares covered hereby.

                  6. Nontransferability.  The Option shall not be  transferable
otherwise than by will or the laws of descent and  distribution,  and the Option
may be  exercised,  during the  lifetime of  Optionee,  only by  Optionee.  More
particularly,  but without limiting the generality of the foregoing,  and except
as  otherwise  specified,  the  Option may not be sold,  assigned,  transferred,
pledged,  hypothecated, or disposed of in any manner, shall not be assignable by
operation of law, and shall not be subject to execution,  attachment, or similar
process. Any attempted sale, assignment,  transfer,  pledge,  hypothecation,  or
other disposition  contrary to the provisions hereof, and the levy of execution,
attachment,  or  similar  process  upon the  Option,  shall be null and void and
without effect.

                  7. Termination  of Employment;  Effect on Employment.  If the
employment of Optionee is terminated  (otherwise  than by reason of death),  the
Option may be  exercised  at any time within  three (3) months after the date of
termination,  but not more  than ten (10)  years  from the date  hereof.  To the
extent  the  Option  has not been  exercised  by such  time,  the  Option  shall
terminate.  Nothing in this  Agreement  shall confer upon  Optionee any right to
continue in the employ of the Company or any parent or subsidiary of the Company
or  interfere  in any way  with  the  right  of the  Company  or any  parent  or
subsidiary of the Company to terminate Optionee's employment at any time.


                  8. Death of Optionee.  If Optionee dies while  employed by the
Company or within three (3) months after the termination of his employment,  the
Option may be exercised  by the legal  representative  of his estate,  or by any
person or persons who shall have  acquired the Option  directly from Optionee by
bequest or  inheritance,  at any time  within one (1) year after the date of his
death, but not more than ten (10) years from the date hereof.  To the extent the
Option has not been exercised by such time, the Option shall terminate.

                  9. Dissolution or Liquidation of Company.  In the event of the
proposed  dissolution  or  liquidation  of the  Company,  or in the  event  of a
proposed sale of substantially all of the assets of the Company, or in the event
of a merger or consolidation with another corporation in any manner in which the
Company is not the surviving  corporation and the surviving corporation does not
agree to  assume  the  Option  granted  hereunder,  the  Option  will  terminate
immediately  before the  consummation  of such  proposed  action,  unless sooner
terminated as of a date fixed by the Board of Directors, in which event Optionee
shall be given the  right to  exercise  the  Option as to all or any part of the
Shares subject to this Agreement.

                  10. Rights as  Stockholders.  Optionee  shall not by reason of
the Option have any rights as a stockholder of the Company until Optionee shall,
from time to time,  have  exercised the Option,  and,  upon each such  exercise,
Optionee shall have, with respect to the number of Shares as to which the Option
is then  exercised,  all rights of a stockholder of record from the date of such
exercise,  irrespective  of whether  certificates  to  evidence  the Shares with
respect to which the Option was exercised shall have been issued on such date.

                  11. Method of Exercising.

                          (a)      Notice of Exercise/Payment of Purchase Price.
Subject to the terms and conditions of this Agreement,  the Option may be
exercised by written notice to the Secretary of the Company,  at the Company's
main office, or at such other address as the Company,  by written notice to
Optionee,  may designate from time to time.  Such notice  shall state the
election to exercise  the Option and the number of Shares in respect of which
the Option is being exercised, and shall be signed by the person or persons
exercising  the Option.  Such  notice  shall be accompanied by payment of the
full purchase  price of such Shares,  by cashier's or certified  check, or by
such other form of  consideration,  if any, as may be approved by the Company's
Board of Directors. In addition to the foregoing,  the purchase  price  for  the
Shares  may be paid  through  a sale  and  remittance procedure  by  with
Optionee  shall  provide  concurrent   irrevocable  written instructions to: (i)
a Company designated brokerage firm to effect the immediate sale of the
purchased Shares and remit to the Company,  out of the sale proceeds available
on the settlement  date,  sufficient funds to cover the purchase price for the
Shares acquired pursuant to exercise of the Option, and (ii) the Company to
deliver the  certificates  for the purchased Shares directly to the brokerage
firm to complete the sale transaction.


                          (b) Stock  Certificates.  Upon the exercise of an
Option,  the Company shall  deliver a certificate  or  certificates
representing  any Shares acquired  hereunder  as soon as possible  after the
notice and payment  shall be received.  Except if issued through the sales and
remittance procedure described in Paragraph  11(a),  the certificate or
certificates for the Shares as to which the  Option  shall have been so
exercised  shall be  registered  in the name of Optionee or in the name of any
other  person or entity  specified  in writing by the  Optionee.  If an Option
shall be exercised by the legal  representative  of Optionee's  estate,  or by
any person or persons  who shall  have  acquired  the Option  directly  form
Optionee  as a result of  Optionee's  death,  whether by bequest,  inheritance,
or  otherwise,  such  notice  shall  be  accompanied  by appropriate proof of
the right of such person or persons to exercise the Option. All Shares that
shall be  purchased  upon the  exercise of an Option as provided herein shall be
fully paid and nonassessable.

                  12. Reservation  of Shares.  The  Company  shall at all times
during the term of the Option  reserve and keep  available such number of shares
of Common  Stock as will be  sufficient  to  satisfy  the  requirements  of this
Agreement,  shall pay all fees, expenses,  and taxes necessarily incurred by the
Company in  connection  therewith,  and shall,  from time to time,  use its good
faith efforts to comply with all laws,  rules,  and  regulations  which,  in the
opinion of counsel for the Company , shall be applicable thereto.

                  13. Registration  of Shares,  The Company shall  register the
Shares  issuable  upon exercise of the Option with the  Securities  and Exchange
Commission  (the  "Commission")  by filing a Registration  Statement on Form S-8
with the Commission.

                  14. Adjustment of Recapitalization.  In the event of any stock
dividend, stock split,  combination of shares,  recapitalization or other change
in the capital structure of the Company or any merger, consolidation,  spin-off,
split-up, reorganization,  partial or complete liquidation or other distribution
of assets,  issuance of warrants or other rights to purchase  securities  or any
other  corporate  transaction  or event  having an effect  similar to any of the
foregoing,  appropriate  adjustments  shall be made by the Board of Directors of
the Company to the number and kind of Shares and the price per Share  subject to
this Agreement.

                  15. Taxes. Optionee agrees, no later than the date as of which
the value of an  Option or Shares  acquired  pursuant  to this  Agreement  first
becomes  includible  in the gross  income of  Optionee  for  federal  income tax
purposes, to pay to the Company or make arrangements satisfactory to the Company
regarding payment of, any federal,  state or local taxes of any kind required by
law to be withheld with respect to the Option or such Shares. The obligations of
the  Company  under  this  Agreement  shall be  conditional  on such  payment or
arrangements,  and the Company shall,  to the extent  permitted by law, have the
right to deduct  any such taxes from any  payment of any kind  otherwise  due to
Optionee.

                  16. Action Taken in Good Faith.  No member of the Board of
Directors,  nor any officer or employee of the Company acting on behalf of the
Board,  shall be personally  liable for any action,  determination or
interpretation  taken or made in good faith with respect to this Agreement.

                  17. Miscellaneous.

                          (a)      Waiver.          The waiver of any provision
of this Agreement will not be  effective  unless in writing  and  executed  by
the party  against  whom enforcement of the waiver is sought.

                          (b)      Entire Agreement.This  Agreement constitutes
the entire  integrated  agreement  among the parties pertaining  to  the subject
matter  hereof,   and  supersedes  all  prior  and contemporaneous agreements,
representations, and understandings of the parties. This Agreement may not be
amended except by written  instrument  executed by the parties.

                          (c)      Arbitration.     Any dispute or  controversy
arising  under or in connection  with this  Agreement shall be settled
exclusively by arbitration,  conducted before a panel of three (3) arbitrators
in Phoenix, Arizona in accordance with the rules of the American Arbitration
Association then in effect. The decision of the arbitrators shall be final  and
binding  on  the  parties,  and  judgment  may  be  entered  on  the
arbitrator's award in any court having  jurisdiction.  The costs and expenses of
such   arbitration,   including  but  not  limited  to   attorneys'   and  other
professionals'  fees, shall be borne in accordance with the determination or the
arbitrators.

                          (d)      Governing Law.   This Agreement  shall be
governed by and construed in accordance  with the laws of the State of Arizona
without regard to its conflict of law principles.

                           (e)      Severability.    If any  provisions  of this
Agreement is held to be  unenforceable  by a court of competent jurisdiction,
the remainder of this Agreement shall be severable and not affected thereby.

                          (f)      Counterparts.    This  Agreement may be
executed in one or more  counterparts,  each of which shall be deemed an
original, but all of which shall constitute one and the same instrument.

                          (g)      Delays or Omissions.      No delay or
omission to exercise any right,  power, or remedy accruing to any party
hereunder or any breach or default under this Agreement  shall impair any such
right,  power,  or remedy,  nor shall it be construed as a waiver of or
acquiescence  to any  single  breach or  default be deemed a waiver of any other
breach or default  occurring  before or after the waiver.  Any  waiver,  permit,
consent,  or approval of any kind of any breach or default under this  Agreement
must be in writing and shall be effective only to the extent specifically stated
in such writing. All remedies either under this Agreement or by law or otherwise
afforded to any party shall be cumulative.

                          (h)      Headings.        The headings in this
Agreement have been inserted for  convenience  only and shall not affect the
meaning or interpretation of any provision in this Agreement.

                          (i)      Assignment.      The rights and  obligations
of the Company and Optionee  hereunder  shall inure to the benefit of and shall
be binding on their successors and assigns.

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

COMPANY:                                             OPTIONEE:

RECONDITIONED SYSTEMS, INC.,
An Arizona corporation




By /S/ Scott W.Ryan                                  /S/ Dirk D. Anderson
  ______________________________                     ___________________________
      Scott W. Ryan, Chairman                                 Dirk D. Anderson