Sales of obsolete or unusable property with an estimated cumulative value in excess of $10,000 shall be sold through public auction, to the highest responsible bidder, after due notice inviting bids, except when a negotiated price may be based on a price higher than past bid or auction as set forth in section 2-678. (Ord. No. 2023-08, § 1, 4-10-2023; Ord. No. 2012-30, § 14, 7-9-2012)