Any sale which may be effected under the powers conferred by section 24 may be made either by public auction or private contract, and the Corporation may make any stipulations as to title, or evidence, or commencement of title, or otherwise, in any conditions of sale or contract for sale or exchange, of the said hereditaments or any part thereof, and may buy in, or rescind, or vary any contract for sale or exchange, and re-sell, or re-exchange, without being responsible for any loss occasioned thereby.