I really just want to build another, I enjoy doing it. I'm trying to build them and make some money.
I understand the sentiment, but unfortunately, you're going to be hard pressed to actually make money from custom builds unless you have a lot of generous friends or stumble across the occasional, "Oooh! SHINY!" customer.
I put together your system (minus the wireless and extra fans) for a little over $1K, new. It's used so knock off 20%. More than six months, so another 5% With the fans and wireless card, I think you could probably ask about $760.