Looking in the wrong places for sure, alot of times the ones you see with those price tags, are still there because they wont move, whereas the cheaper stuff is already gone off of craigslist, forums etc.
For every overpriced one, there are plenty that are more reasonably priced.
My friend sold his 97 Cobra for 8k recently, Fl car all it's life, well under 100k miles, Procharger, tuned, wheels, made 450, brand new redone interior ( he does that for a living) and he was actually going to take $7500 for it until somebody came out of nowhere and offered him 8k right around tax season. Took over a month to sell that car in tax season, in Fl and it WAS NICE.
I almost bought a white 94 Cobra the other day, 331 w/ stock HCI, custom seats with suede done up to look like 03 Cobra seats, best shifting T5 ever, 85k original miles, AC, etc for $6k and even thought that was too high and bailed on it. It's been for sale for months, although he has been asking int he 7700-8900 range.
You can find built motor, blower, nicely done up 96-98 Cobras for under 10k if you really look around, of course you will find plenty still asking 12-15k that are sitting around as well. I have seen an 01 for as low as 6500, a 99 for 6k. 03-04 Mach 1's for 9-12k.
The good thing is Cobras still book high, so loan value is still up there, which helps when selling.
I find people listing the 99-04 GT's for 7-12k too all the time, but then again I know where a Sonic Blue 03 GT is (higher mile car, around 127k but still) for under $5500.
I missed a black 99 GT with black leather, cobra r's, longtubes and other little mods for $3500 a few months ago.