Placing an AutoBidMaster security deposit is a hold on the method of payment, not a charge. The funds may be released back into your available balance before the expiration of the authorization, as each bank is different. This hold lapses every 30 days and must be renewed to continue bidding. When the deposit expires your buying power will be set to zero and you will need to place a new deposit.
Deposits made by wire transfer, however, remain in your account until you request a return or choose to apply it to applicable fees and purchases.
To continue bidding navigate to the "Buyer Power" tab in the main navigation and place a minimum security deposit of $600 US.