The prices listen in those books aren't real. It all comes down to how much the seller is asking and how much the buyer is willing to pay. It can give you a pointer in what range the price should be though. I have seen Holy grails (WIK2 with silverprint) for over £200, one guy is asking £400... So £80, yeah, if it's crap...
There are a lot of testpressing made in just 1-5 pcs, so they are even more harder to come by.
When I think about it... I think I remember bidding on one of those All the Aces promos, it was a cast Iron mask to it... see one of them for sale, but twice.
A headbang a day keeps Beiber away.
Motörheadbanger 2125 - a real fan