Looks a reasonable deal to me for a DSG, assuming the bodywork and alloys are mint
It's got the armrest too

... checkout any other optional extras
My thoughts are
1. Check the 18" Monzas out thoroughly for white worms, scuffs etc. and that they are indeed genuine VW (BBS) alloys. (VW part no & BBS stamped on rear face of wheel)
2. Check whether the car is UK dealer supplied or an import ... ask to see the PDI stamp in the service book.
3. Checkout remaining warranty, if any, and haggle for an extended VW warranty for as long as possible (at least a year). Personally I would'nt fancy having any DSG issues / problems out of warranty.
4. Can't see paddleshifts in the photo ? they must be hiding