Twister EV2 what to look for

A guy comes up to me a a crusin last night and says. Know anyone looking for a Mopar? I say what kind? Then he explains it is a 71Twister with "340" (probably a 318.), AT on column,benchseat, 83/4 and says he has Certi-card, Build-sheet and it is an EV2 car. He is not a Mopar guy and asks what is worth. I say let me look at it before he advertises the car. Before I look give me some help. Other than usual rust, checking for matching numbers, what do I need to look for. School me anything "special about these cars? Give me the 1,2,3 of what to look for.

Craig