Hello Adam and welcome to HostingRefuge

I have to agree with you Stephen, I have seen these hosts and it really doesn't help anyone...apart from the hosts that do a runner with their customer's money.

It isn't just small companies or new companies that offer those kind of plans on eBay, I have seen a few larger doing the same.
They offer what is on their site for a lot less through eBay.

It isn't even worth the time for a real host to think about posting offers on eBay, there is no way you can compete with the others there.