yeh i just picked up an 8o series recently. original paint 8 (out of 1-10). 150,000 on the clock, super clean inside and out. pd 4700. the price for 80 series is all over the place take your time till you find what serves your purpose. took me about 3mo to find mine.
I live like 20 min from Roswell. I can probably go by and kick the tires for ya if you want. As for the 8500, I'm with Patrick. Not worth anywhere near that. A "clean" 80 is going for around 5 in Atlanta. You can get a semi clapped out one for less than that.