Oftentimes, web-based credit card payments are acknowledged promptly.  However, for security towards deceitful purchases, there are orders that get detained because they manually check them with credit card issuers. Putting in a bid on items you do not need or don't actually know about might actually make you repent putting in a bid on them in the first place, especially if you win the bidding process. It is simply far better to steer clear of bidding on items you don't really need.