All of eBay websites.
Some sellers on other international eBay sites list items that they are willing to ship outside their country. These items will show up for matching searches done on any eBay site that originates from a country the seller will ship to.
If you are in one of those countries, you should be able to schedule a snipe on the item that will execute.
So, you may be able to bid on items originally listed on eBay.de, eBay.it, eBay.es, etc., using our service. Any item that you can bid on through eBay.com(eBay US), bidball is able to snipe (minus Live Auctions and Mature Audience Auctions - see question/answer #14).