75 Valiant
In my opinion, any car that runs and drives is worth $700, especially if it's one you want.
Notice that seller has dropped his price from $900 to $700 in just 3 weeks. Maybe could be more motivated with a cash offer in hand $600 or so.
Wouldn't expect much from the sheetmetal / body with his description, but it's cheap transportation..and it's a Mopar.