Nice one. I paid $4250 for a 1990, With 138,000 miles, bone stock, unrebuilt supercharger. And i thought i got a decent deal
It was the cheapest at the time, and the only stock one (I wanted one that was babied its life.
Sounds like you scored. You should check out VWVortex.com (there is a huge corrado section, with lots of info.) I definately reccomend the vortex, always helped me out with problems