(B) Where the board finds, by resolution, that the district has vehicles, equipment, or machinery that is not needed, or is unfit for public use, and the board desires to sell such vehicles, equipment, or machinery to the person or firm from which it proposes to purchase other vehicles, equipment, or machinery, the board may offer to do both of the following:

1. (1) Sell the vehicles, equipment, or machinery to such person or firm; and
2. (2) Have such selling price credited to the person or firm against the purchase price of other vehicles, equipment, or machinery.

(C) Where the board advertises for bids for the sale of new vehicles, equipment, or machinery to the district, it may include in the same advertisement a notice of its willingness to do both of the following:

1. (1) Accept bids for the purchase of district-owned vehicles, equipment, or machinery that is obsolete or not needed for public use; and
2. (2) Have the amount of such bids subtracted from the selling price of the other vehicles, equipment, or machinery as a means of determining the lowest responsible bidder.