In Auctions, you can bid with other managers to get players. Each bid will raise the price by 1 coin and some funds than last bid. As long as there is a new bid provided in the last 10 seconds, then the countdown will be reset to 10 seconds again.
The coins you offered will be frozen(not deducted) if you were the highest bider. You may check your avaliable coins in every bidding interafce. Coins will be unfreezed if your offer was exceeded.