i would recomend using johns auction, most of the time things on his auctions achieve a much higher price than an individual could hope to get for them, the few things he's auctioned for me have achieved on average around 25% more than the average selling price, so, even after he's taken his 15% commision ive still had a good result, however, unless its something stupidly rare they have to be at least a very strong ex- grade