If the bidding is increasing in larger denominations that you are comfortable with, consider offering a lower denomination as your bid. The auctioneer does have the right to refuse it, but there is absolutely no harm in trying.
On the other hand, don’t be afraid to try and increase the bidding with a ’knock out’ bid if your competition is showing signs of slowing down. This can often throw doubt into the mind of the other bidders and get them to stop even though they have not yet reached their limit.
Good luck in your bidding and remember, the staff of De Freitas and Ryan are happy to assist you during our auctions should you need it. [Feel free to ask at any time]