It’s a typo and the person is hoping to get traffic I intended for the “actual” site; People trying to visit “www.eBay.com” but forget to type the first dot, in your example.
Typically the owner will park it and try to monetize the traffic. This is called typo squatting. If it contains a trademark, like “eBay” in your example, they are infringing and could face UDRP or worse.
This is the kind of activities that give domain investors a bad name.