We all make mistakes and sometimes it's easy to get carried away when bidding for an item on eBay and other online auction sites. Once you've bid for an item on eBay, you generally can't remove or cancel that bid unless you have a reason that eBay considers valid. According to eBay rules, you can only remove or cancel a bid if you accidentally entered an incorrect bid amount, if you can't contact the seller by phone or email or if the item's description changed after you bid for it. To remove or cancel a bid on eBay, you'll need to fill out an online bid retraction form.
Open the Web browser on your computer, navigate to eBay and log into your account.
Find the item with the bid that you want to retract in the "Bidding" section of your account page. Click on the item link to open the full details.
Copy the item number from the "Other Item Info" pane on the listing.
Click the "Customer Support" tab from the eBay menu and find the bid retraction form by entering "bid retraction form" into the customer support search box.
Type the item number into the dialog box. Select your reason for removing the bid from the drop-down menu.
Click "Retract Bid." EBay will cancel and remove your bid from the auction.
You can cancel any bid if an item auction ends in more than 12 hours. For items with less than 12 hours to run, you must cancel the bid within one hour of placing it.