For a not stock and not original color, seems a tad high by a lot.
You should see the 1993 Vibrant Red Cobra on eBay at the moment - seller is trying to get $92k for it and it's not even an R....
Some of the asking prices on Fox Mustangs are ludicrous.... there's even a 1985 Notchback on there that is "patina'd" to say it nicely and seller wants $36k for it... if you saw it, it's a $8k Fox all day long....
Yikes.. hindsight 20/20, but the repaint from teal to black was a HUGE mistake.