If those Stangs are as good as they look they are probably in the $15-$30K range. You didn't mention engine.I'm basing my price range on the smallest V8
in each case.
My '64 1/2 vert. Ordered May '64. D code 4 speed, handling package, caspian blue, accent group, Ford blue manual top.
'68 vert. driver. Owned since Apr '78. C code AT, AC, PS, P disc B, PT lime gold, standard black interior and top. NOS RF fender and left quarter.New top and folding glass.