Whenever the Mayor determines that a building or other structure must be removed, the Mayor may authorize the City Administrator to sell the building or other structure for removal from City land by a purchaser. The City Administrator may use any reasonable and appropriate method of sale for the public interest. The City Administrator may specify terms and conditions of sale, except that the terms will not include credit and will fix the amount of bond or cash deposit to be given by the purchaser to guarantee removal of the building or structure and clearance of debris from City land.