In no decree of sale or order thereunder shall there be a requirement for a deposit of cash or other guaranty of good faith prior to the conclusion of the bidding at any judicial sale of real estate, and such deposit or guaranty as may be required at the conclusion of the bidding and of any person who thereafter raises the bid within the period mentioned in §§ 15-39-720 and 15-39-730 shall be five per cent of the bid or some lesser percentage thereof.