Doesn't bother me in the least. If anything, it's funny.
What would I gain from being offended or saddened? It may be a scuzzy thing to do, but I certainly don't want this type of thing to be illegal. I'm sure they're not making much money. Neither of the 9/11 movies were blockbusters.
Yeah, but people buy this expecting to sell it one day.
Good, let them make money. There are so many better things to get angry about. I'm of the belief that anger should only be used as a motivational tool. I don't see any serious problem with people making money off 9/11 coins, thus I don't care. If people buy them, and enjoy them, the seller is doing a public service, regardless of his intent.
People always throw around "Profiting off the deaths of others," as if it's a bad thing. What about something like Schindler's List? If it is done well, somehow it's no longer disgusting? Does the person profiting have to be someone who was affected by the tragedy? If a Nazi made Schindler's List exactly how it was, wouldn't it still be a good film?