Bob, IMO, and it is just that, a frame off on that car and in the current market will bring between $35k-$45k. It has a nice option list, color and auto trans hurts the value to some degree.
The '68's are not as popular as other years and the selling prices reflect this. I'm sure if you were to wait for the 'right' buyer, you could get more money for it...and don't get me wrong, I like these car alot, the market for these cars has never been that great.
For a comparison, here's a link to my '68...one repaint in the 70's and I can probably get $32k for it as it sits.
https://www.yenko.net/ubbthreads/show.../page/1#259774
Mike