Hi Mate,
It does look very clean. I agree completely with Flashbsd - if you can swap the wheels for a standard set, I think you'll also make it easier to sell (as I think black/grey rims have a very limited market).
I'd say between £3,000 to £3,500 for it may due to the low mileage & condition. However, there are loads of cars out there for sale right now, so if you can hang onto it for a while, it might be better to do so...
Wigster.