Sec. 2. (a) As used in this chapter, "contract" means a contract for the purchase of:
(1) real property;
(2) tangible or intangible personal property; or
(3) services (as defined in IC 5-22-2-30).
(b) The term does not include a contract concerning the issuance of:
(1) a bond to finance the construction of a public facility; or
(2) a bond or other type of security for the payment of a lease obligation.