Google warned me about one group, so that I lowered my expectations when selling the wife's A1.
They came in with the highest bid, but came with a warning that actual money in the hand would be about £800 lower on average than was bid.
Sold it to my local Audi garage (sold to Lookers centrally, but inspection by.local garage). The guy at Lookers Silverlink was a complete twit delaying money transfer for no good reason, so I made sure I relieved the car of anything that wasn't bolted down - the red triangle pack, the tyre air compressor, got all the mats out and gave them to a lass at work, the chromed 12v plug cover. I did leave the jack and locking wheel nut.