Seems a reasonable asking price to me. Front floor is $600+, without install, pedals go for $500, the two rear trunk trim pieces are impossible to find, extra parts.
I know some pieces, like the non push button dash panel, can be found for a decent price, but like most 62 pieces, some are ridiculously priced.
Not going the max wedge route myself, but as just a starter 62 Dart it appears to be a good candidate.
I'm not sure the door panels are impossible to find, but I don't need any!