The following may be purchased without giving an opportunity for competitive bidding:
A. Supplies, materials, equipment or contractual services whose cost does not exceed seven thousand five hundred dollars ($7,500.00) in a single transaction; (1983 Code § 7-103; amd. 2005 Code)
B. Supplies, materials, equipment or contractual services which can be furnished only by a single dealer, or which have a uniform price wherever bought;
C. Supplies, materials, equipment or contractual services purchased from another unit of government at a price deemed below that obtainable from private dealers, including war surplus;
D. Contractual service, including, but not limited to, gas, electricity, telephone service, purchased from a public utility at a price or rate determined by the state corporation commission or other government authority;
E. Supplies, materials, equipment or contractual services when purchased at a price not exceeding a price set therefor by the state purchasing agency or any other state agency hereafter authorized to regulate prices for things purchased by the state, whether such price is determined by a contract negotiated with a vendor or otherwise; and
F. Contractual services of a professional nature, such as engineering, architectural and medical services. (1983 Code § 7-103)