biggest thing with these cars is history, if you buy one thats modded you must see proof or you have to treat it as bollocks tuners in the scene know proof is everything so supply it to their customers, as above shafts,clutches and boost leaks most common sources or aggro, and st1 is poverty spec and would pass, but for 4k with prices on these cars all over the place seen them as low as 2k or upto 7k for a prefacelift, and facelifts now start around 3k upwards, all comes down to condition history and spec and mileage