Where an original bid is made by a purchaser direct to the estate and, thereafter, at the time of hearing the return of sale containing the original bid, an increased bid is made by a bona fide agent which results in the confirmation and sale of the property at such increased bid, the court shall allow a commission to the agent who procured the increased bid, which commission shall be fixed by the court at such amount as the court, in its discretion, finds will be a reasonable compensation for the services of the agent to the estate.