Okla. Stat. tit. 12A, § 12A-2-723: Proof of Market Price: Time and Place

(1) If an action based on anticipatory repudiation comes to

trial before the time for performance with respect to some or all of

the goods, any damages based on market price (Section 2-708 or

Section 2-713) shall be determined according to the price of such

goods prevailing at the time when the aggrieved party learned of the

repudiation.

(2) If evidence of a price prevailing at the times or places

described in this article is not readily available the price

prevailing within any reasonable time before or after the time

described or at any other place which in commercial judgment or

under usage of trade would serve as a reasonable substitute for the

one described may be used, making any proper allowance for the cost

of transporting the goods to or from such other place.

(3) Evidence of a relevant price prevailing at a time or place

other than the one described in this article offered by one party is

not admissible unless and until he has given the other party such

notice as the court finds sufficient to prevent unfair surprise.