Any property (other than church property) classified for sale under section
2331 of this title and offered for sale under section
2342 of this title, as to which no priority right has been conferred, or as to which all priority rights have expired, shall be advertised for sale to the highest bidder, subject to the right of the Commission to reject any or all bids. No bid shall be accepted which is below the appraised value or, in the case of Government-owned single and duplex houses is below 85 per centum of the appraised value.