Hmm, looks like it's junk then.
Might have to do a bit of social engineering myself to try to get a a refund out of the guy, but I don't think I have any legal legs to stand on? The guy (interestingly) doesn't advertise them anymore, I was hoping he might have advertised them as parabolic so I could catch him out. Damn.
Oh well. Guess I'll have to wait to win lotto then
thanks for the info.