theres plenty about at that money,
100k miles, black, S2 91 with bridge spoiler and sport seats £4300 (offers)
http://www.ebay.co.uk/itm/1991-PORSCHE- ... 20d1d060ca160k miles, 89 S2 blue - £3000
http://www.ebay.co.uk/itm/1989-PORSCHE- ... 20d15c4754(thats just a couple, ive no connection to either, nor have i seen them in the flesh)
the price of the good ones is going up though, you have to be very careful when looking at them at the areas that rot, sills, floors, rear suspension mounting, lower wings, rear quarter lower areas
cars that seem sound on the face of it, or even have a fresh MOT may not be what they seem, its very easy to hide rotten sills with stone chip paint, fibreglass etc so be very careful as its not a cheap job to repair, same with front wings for the s2 and turbo, currently £750 ish each at porsche, and second hand ones in good nick very rare to see