Had my 1991 8v for about six wonderful months, spent practically nothing on it, does need a service, topped the oil up as realised after five months that I was going to top it up when I got it but forgot. Throttle pedal IS by comparison stiff on these cars, almost seems like twin stage, I just though it didn't go very far, and that the car wasn't that quick, then realised how deep the pedal is, and the fun just kept on coming. They are great cars and a lot of fun, the handling is the main delight, just get decent tyres, especially for the wet weather.
There is a tune up guide on the site specifically for the engine in that car you are looking at: Digifant PB
Mine is a 3 door and in good order, 104k when I bought her for £600, so your's could be a bargain.