Developer website: Scott Stickeler
eBay Addict is a Mac OS X Dashboard widget that tracks all of your favorite eBay auctions for you. Simply enter the item IDs of the auctions you are interested in tracking.
eBay Addict displays the item title, the current price, and the time remaining in the auction. Item status is updated every minute or when manually refreshed.
eBay Addict supports an unlimited number of items, multiple currencies and is Freeware.
*Previously available here