where does the value of a pantera start and come from?
Value comes from the market, what a willing buyer will give a willing seller in an arms length transaction. And overall, Pantera values have definitely been on the rise in the last year or so. Much of this arguably stemming from recent positive press for the marque from such sources as Jay Leno's Garage review on his "new" Pantera, favorable articles in Hemmings and other magazines recently, and featuring prominently on various lists of the most desirable, collectible, or under-valued collector cars lately.
As for the perceived value of your car for sale... It's all about presentation. Creating an ad on Chuck's site is NOT presentation or marketing. About the only people who can/will access Chuck's for sale site are those who already own Panteras and who have contributed info to his site to gain access - probably the poorest site in the whole internet on which to advertise your car if that's the only place you posted a complete ad. List it in the Cars for Sale section of this board, WITH a complete description AND pictures. You're much more likely to reach potential buyers shopping for a Pantera. And, as other's have suggested, list it on other venues - Hemmings, Ebay, Autotrader Classic, Classiccars.com, etc. Again, each ad should have complete information and pictures! You might even try posting an ad on Craigslist.org in your nearest major metropolitan area (and a few other major metro areas - LA, SF Bay Area, New York, Dallas, etc).
Also, put a simple text ad in the Pantera Owners Club of America newsletter (very inexpensive) with your contact info and a link to one of the online ads with details and pictures. Many prospective buyers join POCA in their search for a car.
Last, values seem to favor very clean well executed cars, with a shift toward stock or stock appearing cars lately. There was a time when modified cars (wings, scoops, big engines, tasteless mods) were favored over stock, but all the recent rage over "barn finds" and originality has trickled down to Pantera values as well. That means that visual modifications that are strikingly different from the stock appearance may negatively affect the value of your car. For my money, if I were shopping for a Pantera today, I would automatically deduct the cost of un-doing someone else's modifications from the asking price in order to return a car to an original appearance - this would include the cost of items such as wheels if the original Campy's weren't included, re-doing the interior if it's been reupholstered with bright colors and/or embroidered logos everywhere, etc.
So, post a complete ad on this site with as much detail about the car and it's history, and a bunch of pictures (you can create a "gallery" or just post different pics in separate posts immediately following the detailed information. If you check Ebay's 'ended auction' history, you'll find that vehicles with more complete details and better pictures (quantity and quality) ALWAYS sell for more money. Better pictures means clear crisp pictures, without artsy closeups or photoshop effects (I actually avoid cars with pictures that show ANY photoshop effects), and lots of pictures from different angles, interior and exterior, trunk and engine compartments, undercarriage, and close ups of any flaws, etc. And if you have a book of receipts for any parts or work done on the car, all the better; that gives buyers peace of mind that they're getting a sound car and will pay more.