6k does seem pretty steep unless its in near perfect condition. The only thing I worry about is that it has 100k+ miles on a motor that has no doubt been stressed most of its life. Dijuh run a compression check?

other obvious problems:

cut springs=terrible ride & handling... suspension must be addressed asap. So figure on spending at least another $500-1000 depending on what route you want to take to fix the suspension.

Also a 200k chassis with such obvious lack of attention to the suspension will likely need new bushings throughout. This is a labor-intensive job whether replacing with stock or aftermarket bushings.

Stock exhaust isn't doing that car any good, so figure another few hundred to open up the exhaust.

Summary, sounds like a cool car, but with all the money you'll need to put into it after you buy it, $6k is pretty damn pricey.