always one to post.... in todays market you simply cannot get a premium over 1k IMO, especially when its the easiest colour S3 to get hold of..... your aiming for someone who really really wants a new as possible car, id put money on you having to reduce it, theres still a kingfisher blue one for sale 12 months on with similar mileage and a much more desirable colour combo, the guy is a dreamer an clearly is not in a rush to sell, daft thing is his cars depriciated that much over the time he's waited, he may aswell have put it up for a realistic price in the first place.
good luck with the sale, but think you'll put more people off with the price, i could advertise mine for £30000 and be willing to negotiate, would you approach me knowing what ive set the price at? course not because im being unrealistic to start with.... the dolphin one that went for 9500 was realistic given the colour (one of the rarest) not a bargain assuming that it was at least an 03 plate IMO
you clearly arent in a rush