That red one looks like a beauty

The ammount you spend depends how much work you are willing to do yourself, I spent £375 on a shed of an 8v with a massive list of faults, and I've gradually fixed it up

If you spend £3k+ you should expect to have pretty much nothing wrong with it, or some rare factory options as even with mint bodywork and low milage this is quite alot of money to spend on a MK2!
One thing to add, PAS was always an option right from the beggining of MK2 production, and was never fitted as standard, except on some limited/special editions, run out models etc.
A few other options were electric windows, electric heated mirrors, headlight washers, electric headlight range adjustment amongst other things. You could also get a cool Votex centre console, which is especially sought after!