(1) Every sale under section 2 shall be subject to a reserved bidding, and the amount of such bidding shall be fixed by the court in such manner as it may think fit and may be varied from time to time.
     (2) On any such sale any of the shareholders shall be at liberty to bid at the sale on such terms as to non-payment of deposit or as to setting off or accounting for the purchase-money or any part thereof instead of paying the same as to the court may seem reasonable.
     (3) If two or more persons, of whom one is a shareholder in the property, respectively advance the same sum at any bidding at such sale, such bidding shall be deemed to be the bidding of the shareholder.