No offense meant to the O.P. but I bought a computer advertised on GFY, or one of the boards, from area51 a year, maybe two ago. We agreed on a price, I paid once I received my invoice, and he delivered what was promised, disregarding our past history (and me getting him banned once).
Despite that, a deal is a deal. That is how this board works, and typically why I do not worry about being trolled anymore. People are going to buy based on their needs, the deal, and the price. If you have what they need, they are going to buy and the rest of it is little more than board fodder. The only people who care about trolls are trolls. All that other drama bullshit just gives you added attention to focus others on your wares. So make that negative a positive.
That said, I have done business with Justin (area51) in the past, and he delivered as promised.