This really is not that big of a deal, and it resulted in no harm whatsoever to Mr. Simple. I would say "okay, no prob" and then sell the knife to the next guy who wants it. No money exchanged hands, no knife was packed up or shipped off, and like Mr. Comeandtakeit said, Mr. Simple had not even had time to change to sales thread. Mr. Comeandtakeit has 50+ positive iTrader transactions, and 1 negative exchange. At best its "uncool" to change your mind in 10 minutes, just like its uncool to change your mind about coming over to your buddy's house to play basketball. But calling someone "scummy" or not a real man? That's just stupid. There is a mob mentality thing going on here, and if this thread survives for a couple of more pages, people will be burning torches and getting out the noose. Over what, exactly?
Uncool? Maybe. I bet that some of us in this thread do an uncool thing or two today too. But scummy, unmanly and worthy of getting kicked off the forum? Give me a break. Playing the wounded victim role (for no good reason, IMO) when a guy says no thanks to your knife is uncool too.