well I think I got pretty lucky on mine, 95 gen 1 and I paid $3,400. My friend's is a 94 gen 1 and he paid $3,800. both are in very good condition though. I have noticed that they are cheaper back east but the rust factor would scare me. I have also noticed that there are a bunch located in florida.
It's like anything eles, if you want it you will pay for it. Still a bargin if you ask me though, I love my mark VIII !!!!!! I have seen beat up gen 1's at shady used car dearerships that were asking 6k and I couldn't beleive it.