I think this goes to Wayne's recent post about colors that make a car easy to sell. This isn't one of them. That doesn't mean it's not a good color, it just doesn't have widespread appeal, at least on a Targa. The color issue is extremely important for Targas, IMHO. For whatever reasons, silver for early Targas with stainless roll bars and black for later Targas with black roll bars look best to my eye.
In this case, I'll bet if the car had been either A) silver metallic, or B) a coupe in the same signal orange it would have topped $20K. Only because it would have drawn more interest.
Lastly, the photos are horrendous and don't show the car at its best!!! Not only a drab day, but they caught all the wrong 'angles' of the car. Had the same car been photo'd by Cal. Classix, it would have been on a beautiful sunny day on a winding road with just the right lighting and angles (and maybe Simone spread-eagled on the hood or something!). And the bidding probably would've topped $30k!
-- Curt