Wis. Stat. § 24.15: Private sale.

All public lands, including forfeited lands and mortgaged lands bid in by the state, which have once been offered or reoffered at public sale and remain unsold, shall be subject to private sale at the minimum price fixed for the sale of the land by law to the person first making application for the purchase of the lands, if the person immediately complies with the term of sale. If 2 or more persons apply at the same time to purchase the same lands under this section, the lands shall be offered to the highest bidder, and the applicant who will pay the highest price shall be the purchaser.