For that much money, it should be perfect. I bought mine for $3,200 and it sounds like it was in better condition than the one you're describing. Things like the window not working, or the temp. display blacked out aren't a big deal, but the A/C should work great and the 0-60 should be 11 seconds or so. Being a little slow off the line is a common problem, but once you hit 2300 RPMs you should really feel the power of that big turbo'd engine.
Even for $7k, I'd pass with as many problems as you mentioned. They aren't made out of gold
