RRS, here is my attempt to answer some of your questions:
1) Is the price good? Well, it all depends on where you are and what YOUR local market is like. I think that $80,000 is a pretty darned good price. It would be a very good price in the US and an even better one in Canada (we just don't have that many cars to chose from). So it really depends on what your local market looks like. Are there many of these for sale? What prices?
2) What to check? With such low mileage you would think that it is fairly low risk. Try to find out if the car was tracked and by whom. Tracking is not necessarily a bad thing depending on the previous owner's level of experience and care. Try to get a DME reading to see how many over-revs (ignition cutt-offs). This is recorded and should be a good indication of abuse... or inexperience. Also, you can see the number of operating hours on the motor. A bit of math should tell you if the mileage is close to accurate (i.e. X hours @ average of ~100km/hour = total miles on car)
Look for signs of re-paint: orange peel; paint ridge at body openings such as doors and hood.
3) Differences Mk1 v Mk2? Well haven't thought about this for a while but there's lots of info out there. Top of mind: More HP, Center-Lock Wheels, and then, there's the body, but you know that.
GL
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Slow In, Fast Out
