Document:

<PAGE>

                                 Exhibit 4.3.1

                          MAINSTREET BANKSHARES, INC.
                         SHARES SUBSCRIPTION AGREEMENT

To:  MainStreet BankShares, Inc.
     Suite 12
     730 East Church Street
     Martinsville, Virginia 24114
     Attn: Andy McCullar, President

Gentlemen:

     You have informed me that MainStreet BankShares, Inc., a Virginia
corporation (the "Company"), is offering 891,807 shares of the Company's Common
Stock ("Shares") to the public at a price of $10.50 per Share payable as
provided herein and as described in and offered pursuant to the Prospectus
furnished to the undersigned herewith (the "Prospectus").

     1.   Subscription. Subject to the terms and conditions hereof, the
undersigned hereby tenders this subscription, together with payment indicated
below in United States currency by check, bank draft or money order payable to
"MainStreet BankShares, Inc. - Escrow Account", representing the payment of
$10.50 per Share for the number of Shares indicated below. The total
subscription price must be paid at the time the Subscription Agreement is
executed.

     2.   Acceptance of Subscription. It is understood and agreed that the
Company shall have the right to accept or reject this subscription in whole or
in part, for any reason whatsoever. The Company may reduce the number of Shares
for which the undersigned has subscribed, indicating acceptance of less than all
of the Shares subscribed on its written form of acceptance.

     3.   Acknowledgments. The undersigned hereby acknowledges receipt of a copy
of the Prospectus, and represents that this subscription is made solely on the
basis of the information contained in the Prospectus and is not made in reliance
on any inducement, representation or statement not contained in the Prospectus.
The undersigned understands that no person (including any officer or director)
has authority to give any information or make any representation not contained
in the Prospectus, and if given or made, such information and representations
should not be relied upon as having been made by the Company or its officers or
directors. This Subscription Agreement and the Prospectus contain the entire
agreement and understanding among the undersigned, the officers and directors
and the Company with respect to the offering and sale of Shares to the
undersigned. This Subscription Agreement creates a legally binding obligation,
and the undersigned agrees to be bound by the terms of this Agreement.
<PAGE>

     4.   Revocation. The undersigned agrees that once this Subscription
Agreement is tendered to the Company it may not be withdrawn by the undersigned
and that this Agreement shall survive the death or disability of the
undersigned.

     5.   Governing Law. This Agreement is governed by Virginia law (other than
its principles of conflict of laws).

     By executing this Agreement, the subscriber is not waiving any rights he or
she may have under federal securities laws, including the Securities Act of 1933
and the Securities Exchange Act of 1934.

     Please indicate in the space provided below ("Registration Instructions")
the exact name or names and address in which the stock certificate representing
Shares subscribed for hereunder should be registered.

____________________________________________
No. of Shares Subscribed at $10.50 per Share

____________________________________________
Total (Funds Tendered)

____________________________________________
(Signature of Subscriber)

____________________________________________
Name (Please Print)

____________________________________________
(Signature of Subscriber)

____________________________________________
Name (Please Print)

Date:  _____________________________________

Residence Address:

____________________________________________

____________________________________________
City, State and Zip Code

____________________________________________
Social Security Number or other
Taxpayer Identification Number
<PAGE>

                           REGISTRATION INSTRUCTIONS

Name:  ___________________________________________

Mailing Address:  __________________________________________________________

                  ___________________________________________________________

Social Security Number of Taxpayer Identification Number:________________

If certificates will be registered in more than one name, please print the full
name of each person or entity and indicate the type of legal ownership by using
the following abbreviations.  If you fail to identify the type of legal
ownership, certificates for subscriptions made in the name of two or more
persons will be issued in the names of such persons as joint tenants with right
of survivorship, and not as tenants in common.

TEN COM - As Tenants in Common
TEN ENT - As Tenants by the Entireties
JT TEN - As Joint Tenants with Right of Survivorship and not as Tenants in
Common
UNIF GIFT MIN ACT - Under Uniform Gifts to Minor Act,

     Custodian:  __________________________________

     Minor:      __________________________________<PAGE>

                                 Exhibit 10.13

                                LARRY A. HEATON
                                 P. O. BOX 397
                            COLLINSVILLE, VA  24078
                                 540-647-1425

                               November 15, 2000

Mr. C. R. McCullar
President and CEO
Smith River Bankshares, Inc.
730 East Church Street, Suite 12
P. O. Box 1224
Martinsville, VA  24114

Dear Andy:

     Thank you for the opportunity to meet with you and Bill on Monday.  Based
on our conversations, the following sets forth the terms under which I agree to
provide consultant services to your Company.

     The intent is to study/research the Franklin County market to determine the
feasibility of establishing a locally-named and operated unit bank of Smith
River Bankshares, Inc.

     I would propose that I would commence the study immediately and complete
and submit to you my written report no later than December 15, 2000.

     The scope of the work would include the following:

  .  Accumulation and analysis of historical deposit information for the entire
     Franklin County market.

  .  Identification of potential branch sites.

  .  Identification of potential talent for staffing.

  .  Conversation with select individuals to determine the "current climate" and
     potential ability to raise capital dollars.

  .  Preparation of a pro forma bank application, i.e., balance sheet and income
     statement (would propose to work with Brenda Smith to accomplish this).
<PAGE>

     Upon completion, a summary report with specific action plans or
recommendations will be prepared for your review.

     A flat fee of 46,400 would be charged.  This would include all expenses.  I
would request that payment in full be made on January 2, 2001.

     I agree that all information I receive in connection with the performance
of my duties as a consultant for your Company, regardless of the source,
including but not limited to information I receive about your Company and its
strategic objectives, will be kept confidential and will not be disclosed to any
person or entity at any time without your express, prior authorization and will
be used solely for the benefit of your Company. I will also not disclose to
anyone the fact that I am engaged as a consultant for the Company. My
obligations of confidentiality hereunder will continue for 5 years from the date
of this letter.

     This attempts to set forth general guidelines. It is understood that
modifications may be necessary as we move forward. All modifications will be in
writing and signed by both parties.

     I look forward to working with you to determine the feasibility of this
expansion opportunity.

                                        Sincerely,

                                        Larry A. Heaton

Agrees to and acknowledged this _____ day of November, 20001.

______________________________________
C. R. McCullar, President and CEO
Smith River Bankshares, Inc.<PAGE>

                                 Exhibit 10.14

January 26, 2001

Mr. Larry Heaton
P. O. Box 397
Collinsville, Virginia 24078

Dear Larry:

Smith River Bankshares, Inc. is pleased to engage your services effective
January 16, 2001 for the purpose of assisting with the establishment of a denovo
bank in the Franklin County market.

The following is a broad description of your anticipated duties during the
organizational process the duration for which we expect to be approximately
seven months.

Duties
------

   .  Identify and obtain an agreement from approximately ten individuals from
      the Franklin County area to serve as organizing directors and investors in
      a denovo bank to be established in Franklin County. Upon opening the bank
      for business these individuals will become the statutory directors of the
      bank.

   .  Lead our effort to select a name and initial site for the bank.

   .  Assist in our preparation of the application for a bank charter which will
      be submitted to the OCC and FDIC for approval.

   .  Assist in our preparation of five-year proforma balance sheet and income
      statements.

   .  Assist with our preparation of a prospectus which will be used to conduct
      a secondary public stock offering focusing primarily on the Franklin
      County area.

   .  Work with The Carson-Medlin Company, Investment Bankers, in establishing
      an appropriate price at which the stock will be sold.

   .  Lead the effort to raise additional capital in an amount (to be
      determined) sufficient to successfully complete the offering and allow us
      to open the new bank.

It is anticipated that the entire process of organizing a denovo bank in
Franklin County will take approximately seven months during which time you will
function as a consultant to Smith River Bankshares, Inc. reporting to me and the
board of directors for the corporation.
<PAGE>

Upon the successful completion of the stock offering and the opening of the bank
in Franklin County, we anticipate that you will be elected President, Chief
Executive Officer and director of the bank, subject to applicable regulatory
approval.  Your commitment to accept this position will be included in the
prospectus and a news release describing such will be made by Bankshares at the
appropriate time.

In addition, upon the opening of the Franklin County bank you and up to three
additional directors of the new bank as determined by you, will be nominated for
election to the board of directors of Smith River Bankshares, Inc.

Compensation
------------

  .  A consulting fee of $6,700 per month from January 16, 2001 and until the
     prospectus is effective;

  .  The above consulting fee will be increased to $7,500 per month from the
     date the prospectus is effective, the stock sale commences and until the
     stock sale is successfully completed;

  .  The consulting fee will be terminated upon your election to President and
     CEO of the Franklin County bank.

If at anytime during the organizational process the board of directors of Smith
River Bankshares, Inc. determines that it would be prudent to terminate the
process as a result of being unsuccessful in either obtaining all necessary
regulatory approvals or the desired level of additional capital, or for any
other corporate reason, and you will be paid the pro rata amount of your
consulting fee earned through the date of termination, this consulting arreement
will end effective immediately upon such action being taken.

Larry, we greatly appreciate your agreeing to assist Smith River Bankshares,
Inc. in its pursuit of establishing a bank in Franklin County, Virginia.  We are
very excited about the prospects for success of such a venture and feel that
with your leadership as President and CEO, the new bank will quickly become a
valuable resource to Smith River Bankshares, Inc.

If you have questions regarding any of the above information, please call me at
(540) 632-8092.  Otherwise, please sign the acknowledgement copy and return it
in the enclosed self-addressed envelope.

Sincerely,

C. R. McCullar
President and CEO

_______________________________
     Larry A. Heaton

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00026-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00026-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00026-of-00352.parquet"}]]