A lot of first time buyers and a good portion of Buyers in general don't really understand how to use the deposit system. What they don't understand is that it's a minimum amount, not a maximum amount. A Buyer decides that he wants to spend 30,000 yen on an item so he makes a 15,000 yen deposit. He bids 30,000 yen, but in the last minute he gets outbid at 31,000 yen, then he's angry that he didn't have the ability to raise his bid in the last minute. The problem is that he didn't understand how to properly use a deposit.
Again, a deposit is a minimum. It's to protect a proxy in case the Buyer doesn't make good on the full payment after he wins an aution. That's all it is. If you know that you're going to pay for an item then a deposit is just a formality. The problem is that Buyers have it in their heads that they have to send 50% of their max bid amount, so that's all they send. But you can send 60%. Or 70%. Or all 100%. If you know you're going to pay for the item after you win then why not send the full amount as the deposit?
If you think you want to spend 30,000 yen on an auction then put in a 20,000 yen deposit. That way you can make 40,000 yen in bids. You don't have to bid over 30,000, that's still your choice. But if you only make a 15,000 yen deposit you don't have that choice anymore. You're limited to 30,000 yen because your deposit puts that limit on you. You're going to have to pay the rest of the balance right after the auction anyway, so you're not saving any money. Instead of 15,000 yen before and 15,000 yen after you're sending 20,000 yen before and 10,000 yen after. The 30,000 yen total doesn't chage, but if you send 20,000 yen as a deposit you now have the option to bid 31,000 or 32,000 yen in the last minute if you want to.
So don't let your deposit limit your options in the final minute. A lot of times Buyers have the money, they want to buy the item, they want to raise their bid, but they can't because their deposit won't let them.
