If the auction has not yet opened you may change the value of your bid. However, you cannot retract or cancel the bid.
Once you place a bid, you agree to pay for an upgrade up to the value of your bid if you win. You cannot retract or cancel your bid.
We are mindful that sometimes a bid may be a mistake, so we do ask you to confirm your bid before you place it. As a general rule, you cannot retract or cancel a bid. However, sometimes honest mistakes do occur. If this is the case, please contact our team at firstname.lastname@example.org.