Moparal beat me to it - there's just not enough information to do more than hazard a guess. Is this a survivor? How many miles? Any rust? Based solely on photos, I'd say $25k, maybe, but there's so much more info that's needed to give an informed opinion.
Ultimately, the real question is: how much are you willing to pay? I know you don't want to overpay, but if you drive away in your new acquisition feeling like you got a fair deal, then whatever you paid is appropriate. Whether Al or I or anyone else would pay that is irrelevant.