What are the bid increments?
Any new bid must be greater than the current high bid. The additional amount you're required to bid depends on the price of the item being auctioned. (In other words, bid increments are determined by the item's price.) For example,
if you want an item with a current price of 1000, then you must bid at least 1100 (See also automatic bidding.)
The table below shows the required bid increments for Yahoo! Japan Auctions:
| Price of Item | Increment |
| ¥1 - ¥999 | ¥10 |
| ¥1,000 - ¥4,999 | ¥100 |
| ¥5,000 - ¥9,999 | ¥250 |
| ¥10,000 - ¥49,999 | ¥500 |
| ¥50,000 and above | ¥1000 |
The bid increment can't be changed by the seller or the bidder. The bid increment will only be changed as the current high
bid increases.
What is the automatic bidding?
You can bid on an item by automatic bidding (automatic bidding is also referred to as "proxy bidding"). Enter your maximum bid (the highest amount you are willing to pay) amount than the Current Bid Price, and click on the "Place a Bid". Automatic bidding places bids on your behalf at the lowest possible increments. The goal of automatic bidding is for you to win the auction at the lowest possible price. Your maximum bid is only placed when another bidder also bids up to that amount or
when thereserve price is equal to or greater than your maximum bid. Bids will increase based on the bid increment set for the auction. Therefore, the current bid will equal the former bid plus the bid increment.
How does a buy it now price affect automatic bidding?
It's important to remember that when you bid the buy it now price on an auction, you're choosing to win the auction immediately at that exact price. Therefore, when you bid the buy it now price, you override the automatic bidding process.
If you prefer to use automatic bidding when bidding on an auction that has a buy it now price set, make sure to place your maximum bid below the buy it now price amount.
What's a reserve price?
The reserve price is the lowest price the seller is willing to accept for the auction item. When posting an auction, a seller sets a starting price. This amount is usually low, allowing the seller to attract bidders who then drive up the price naturally, by placing bids. The seller can set a reserve price. This price is higher than the starting price. If the reserve price isn't met by the close of the auction, the item won't be sold. Neither the bidder nor the seller will be under obligation to complete the sale, and no contact information will be exchanged. If an auction has a reserve price that hasn't yet been met, this information is indicated next to the title in any auction
• Reserve prices are secret—no one but the seller knows what the reserve price for a given auction is. "Reserve not met" indicates that a reserve price has been set for the listing and that bidding has not yet exceeded this price.