I think there's everything wrong with it, to be honest. Especially when you consider that the members of said FC may not want someone to come in and take over just because they're flashing gil around. Other people within the FC may be more suitable to simply be promoted to leader if the original leader really wants out.

It's not the same as selling a crafted item at all.

Someone sent me a /tell asking me to sell my FC to them simply because they wanted a house of their own. They very literally wanted to take over an FC instead of simply joining one because they wanted everything "their way". What kind of douche would I have been if I'd had sold my FC and it's members to some twat like that?