I do wonder in these sort of instances what the PM's that the seller receives do make him think. I know some of the guys are pretty keen to pick the stuff up, and some buy and sell, so need a margin, but you have to think what is the seller thinking. He has asked for a valuation and in effect received several, all different. Some may be from people to flip, so its on the low side with a margin, some may be from someone who really wants the canadian case, so will be possibly higher to ensure they are in with a shot. How does he know what his stuff is really worth? He doesn't know the community, so is he to trust all of the different offers. Alternatively, he can put it on Ebay.
This will continue to happen with the one post wonder guys, and is this really what the valuations thread is for. Its more useful for someone like myself to post, say a 12 back Tusken Raider with a slightly squashed bubble that I no longer want, that is going to go from the valuations thread, straight to the for sale thread.
Don't be entirely down on these posts. Not long ago Coomber75 turned up looking to sell his loft find Vinyl Jawa and childhood collection. We scoffed, then the photos came, then the collection didn't get sold, and we picked up a new member. Some good comes of these, sometimes.
Just my 2p worth. Don't be too hard on this guy. Its his stuff and his right to do with it what he wants. At least he had the decency to explain his decision, which he didn't really have to do, as well as apologising.