Okla. Stat. tit. 19 § 421
After November 1, 2009, each board of county commissioners of the several counties in the state shall within thirty (30) days after the disposition of any tools, apparatus, machinery, and equipment belonging to the county or leased or otherwise let to it or any department thereof, the original cost of which is more than One Thousand Dollars ($1,000.00), whether sold, exchanged, junked, leased or let where authorized by statute, shall enter, or cause to be entered, in the minutes of the proceedings of the board the fact of such disposition, including complete description of item, serial number, the date property was acquired, the name and address of the person or firm from whom property was acquired, the cost price at time of acquisition or contract price if acquired under lease-rental agreement, the date of disposition, the name and address of the person or firm to whom property transferred, the price received therefor and the reason for disposition.
Okla. Stat. tit. 19, § 421