Also if you guys could point out another commons issue i should look out for or beware of i would really appreciate it!
Cheers,
Sid
The mk6 GTI had 17" powder coated alloys as standard but most were specced new with 18" Monza Shadow alloys (the diamond cut ones). Diamond cut alloys should be checked carefully for signs of curbing or "whiteworm" corrosion, where the lacquer coating has become damaged, allowing water to get under the lacquer and creating a milky white appearance. If they're damaged or suffering from "whiteworm", to get them refurbished properly costs around £80-90 plus VAT per wheel. Also, check the inside edge of the rear tyres for signs of uneven "sawtooth" wear. If present, you'll be able to feel the tread is 'stepped' on the inside edge by running your hand around the inside edge of the tyre and likely to have been caused by the wheel alignment being out. Sawtooth wear pattern on the rear tyres will create a sound like worn wheel bearings once you get to approx 40-50 mph.
DSG gearbox cars require a gearbox service (oil change) every 40k miles, so ensure this has been done depending upon mileage. Also, check the service history to make sure the car has been serviced on time.
Xenon-equipped models are rare, but the xenon headlamps are very good (I had them on my mk6 GTD), so a bonus if you find one with these. Other worthwhile options are the RNS510 head unit (the one with sat nav) or the RCD510 unit (with multi-CD player). Both of these have touch screens and are a step up from the standard head unit. Leather is desirable, but VW leather in the Golf is prone to sagging on the right hand seat bolster on the driver's seat. for cloth seat models, check the drivers seat bolsters for wear.
Remember, there are plenty of mk6 GTI's out there, so take your time finding the right one.
Good luck in your search.