Found this example on RIA website:
Explains it better:
: An absentee bid is placed on a lot for $1000. Live bidders and other absentee bids at the auction bid the lot up to $900. At that point, we advance the bid on the sealed bidder’s behalf to $950. If there is no raise, the sealed bidder wins the lot for $950. However, the auctioneer asks for $1000 and if a competing live bidder bids $1000, we of course will take the bid. Looking at the sealed bid in this case, the sealed bidder told us not to spend more than $1,000. We are not authorized to go to $1,100 for the absentee bidder, so the live bidder is the successful buyer at the $1000 bid point even though it is exactly the same as the sealed bidder
