I also wonder what credentials are required to be an appraiser. I have paperwork showing that mine was appraised in 2008 for $32k lmao
As far as the issues go, you guys do realize this is a 50 yr old convertible, right? I think $3500 is a fair price if it runs and drives. I can tell you for sure though, early Mopar a-body parts are rare, so things like the missing trim will either cost quite a bit, or you'll have to live with some wore out pieces here and there. Also, V8 swaps are very easy in them.