Those are Bichirs, $100 seems a lot for only 10 inches, then again I'm cheap when it comes to paying for fish lol They certainly are nice though, probably worth it. I would low ball him at $65 and hope he wouldn't go past 75I think $50 is a fair price for both, $25 each.
they're palmas polli
I don't think thats a bad price. Usually LFS sells them for $49.99 4-6". In Ohio thats a really good price for 10" in other areas might be kind of high.