I would say this speaks loads in itself.

(A) you upgraded your SRT6 to a 74mm

(B) you reniged on a completed transaction

(C) you didn't even bother to counter offer to compensate your gross mistake when an honest observation by the purchasing party was made. Simply a "I screwed up.. Sux to be you"

And as a footnote I'm currently running my 74mm setup. $65 shipped on ebay minus $22 in Ebay bucks from earlier tire purchase, so do the math and realize it's your tasteless handling of this that won't be forgotten.

I'd say real good indicator of personal values have been indicated in your transactions.

In summary here.. your willingness to profit over someones lack of knowlegde (remember your attempt at luggage selling for a profit? Because "they" don't know your going to get in there pocket..) Really should have been extended back to you.