If any mods have been done make sure it's by a decent tuner is the main one. On the dash make sure only 1 light stays on either Tarmac gravel or snow if all 3 come on don't buy until corrected (expensive potential) and apart from that the usual buying car bits really
If you can go for the fq, believe me you will end up changing bits and pieces on it up to fq spec anyways and there are a lot of fq goin well priced at the mo