I say no go on that car. That rust is pretty bad.
A few weeks ago, I was in a similar position as you. There was a white '91 Miata with Hard top, alloy wheels, and mtx that had slight front end damage (needed a hood, bumper, right headlight and right fender. It only had about 60k on the ODO as well. It went for $1500 (Buy it now set to $1650). That price alone was worth the hard top and even if I didn't fix the car, I could have parted it out and still made most, if not all, of the money back. The only thing that kept me from buying it was lack of storage. I'm still kicking myself for passing on it (I'm sure I could have found some place to keep it if I tried hard enough).