In Transaction, you can make an offer to your desired player. A 24-hour countdown will begin when the first offer is provided and this player will be signed by the highest bidder in 24 hours.
You can also buy a player with buyout price, buyout price is the ideal selling price of this player for seller. So when your offer reaches buyout price, you will get this player immediately.
The coins you offered in Transaction will be frozen(not deducted) if you were the highest bidder. You may check your available coins in every bidding interface. Coins will be unfrozen if your offer was exceeded or the player you bid was delisted from Transaction.