Bidding Explained
What is a "Live Bid"
All bidding starts at £100 and you must place a bid that is higher than the current bid. Below the bidding box, you'll see the minimum increment needed to place a bid. You must add at least this increment to the current best bid if you want to participate in the auction.
What is a "Max Bid"
To use SB’s Max Bid functionality, bid the absolute maximum that you're willing to pay.
If the maximum you entered is higher than the bids entered by anyone else so far, you become the new high bidder. SB "bids up" the auction on your behalf so that your bid is the minimum increment above your closest competitor's highest bid, but no higher. If your maximum bid is not the highest bid entered so far, SB registers your maximum bid but continues to bid on behalf of the high bidder, automatically outbidding you by the minimum increment.
SB continues to automatically bid on behalf of whoever is the highest bidder at the moment, up to and including their maximum, until auction time runs out. If two bidders place the same Max Bid value, the leader will be the first one to have entered this bid.