Hi chap,
Well, first off, if you don't like red, black or silver you're jiggered
But seriously, the usual used-car checks are always good, check for accident damage, any evidence of resprays, have a good look around the car both inside and out for any damage, especially the interior, and especially if it's gonna be a leather interior!
Five things spring to mind at the moment, with regards to the GTi:
1.
Pedal box recall: make sure it's been done! If the owner hasn't got receipts for the work (which was done under warranty as it's a manufacturer recall), you can check with VW to see if it's been done. All Polo GTi owners had a letter to advise them of the recall so it's usually not been missed.
2.
Cambelt/toothed belt assembly: this can go far too early in it's life, a few of us, including myself, have had the cambelt tensioner fail, in my case whilst at speed. Check it out to see if any problems have been encountered - depends on mileage too as to whether it has failed or been replaced at any time, they
should last to 60,000 miles!
3.
Corroded BBS alloys: the original BBS RX2 alloys suffer from corrosion in a big way, I believe this is down to how they were lacquered, and water damage can occur from the inside out, so check all four alloys and make sure they're straight! Whilst you're down there, check the tyres too...
4.
Electrics: Make sure
everything works, radio, CD changer, lights, sunroof, windows and so on. If you get the car in a private sale you won't have a 12 month warranty to cover any electrical (or mechanical for that matter) faults!
5.
A/C or Climate Control: Be absolutely certain the A/C or climate control works, and blows out both hot and cold air when asked to do so. Re-gassing costs about £100-120 from a VW dealership IIRC so you could do without that cost if the A/C isn't working right. I didn't think to check it on mine and had to have the system regassed at cost 6 months after buying the car, as VW refused to do it unde rthe warranty or as a goodwill gesture, so I ended up a little out of pocket over that one...
Thats all I can think of right now, I'm sure there's more though. Over to everyone else!
Cheers