You can change your original auction description, title, category, quantity, payment types accepted, or international shipping preference after your auction has been posted, provided that no one has placed a bid on the auction or the reserve price has not been met. However, it is not possible to change your start price, reserve price, or buy price.
If your auction doesn't have a bid:
You can change your auction description, title, or category by clicking "Click here to manage this auction" in the "You are the seller" box on your item's auction page.
To change the description, click the "Change Title/Description" link. Any changes made replace the old description.
To change the auction title, click the "Change Title/Description" link.
To change the category your auction is listed in:
If your auction doesn't have a bid, you can change the payment types accepted, your international shipping preference, or the quantity of items (if your rating is greater than five).
To make any of these changes, simply click on "Click here to manage this auction" in the "You are the seller" box, on your item's auction page. On the next page, click the "Edit Auction" link.
If a bid has been placed on your auction:
If your auction already has a bid placed or if the reserve price has been met, it's not possible to change the description, title, or category. However, you can still update your auction description to provide additional information about your item. The additional information appears below the original description and is dated.
To update your auction with additional information:
When you update your auction, all current bidders are notified of your update via email or Yahoo! Messenger.
Throughout the entire duration of the auction, you have the ability to:
To make any of these changes, simply click the "Edit Auction" link.