There may be occasion when you need to end an eBay auction early without allowing it to run to the scheduled end date. EBay's policy allows you to end an auction early if the item is lost, broken or no longer available for sale. They also allow auctions to be ended early if the seller has made an error in the listing or price of the item.
Instructions:
1) Log into your eBay Sellers account and go to your My eBay page.
2) Scroll down the column on the left side of the page and click on the word "More" under the Related Links subheading.
3) Choose "End My Listing Early" from the Managing Your Items menu.
4) Type in the item number of the auction you need to end early. The item number can be found on the auction page. You may wish to copy and paste the item number instead of typing it to eliminate chances of making an error.
5) Click on "Cancel Bids" and "End Listing Early" if bids have already been placed on the auction. Bidders will get an email from eBay letting them know that the auction was ended early. If there are no bidders on the auction yet, click on "End Item Early."
6) Tick off the box next to the reason you are ending the item early and hit the "Submit" button.
Source - eHow
