You can now embed eBay auctions in your posts. All you need is the item number. Using the button in the editor, add the [noparse][ebay][/ebay][/noparse] tags and place the item number between them:
[noparse][ebay]350511177680[/ebay][/noparse]
[EBAY]350511177680[/EBAY]
[noparse][ebay]350511177680[/ebay][/noparse]
[EBAY]350511177680[/EBAY]