[jnshmoo]

I agree with those saying that you did the right thing. I'd also like to point out that since you had actually already posted your "signature" on the forums, that you would have looked bad for pulling out rather than the other guy.

While I think that a verbal agreement should be honored, the fact that you already put it "in writing" would have made things much worse. I'd also be much more upset if I were involved in a trade with someone who backed out after posting it in the forum than if he pulled out after a verbal agreement.