There's something odd about that listing. He paid exactly $800 for it and then the guy changed his mind. Now he's selling it for absolutely no profit, despite the fact that he made it for profit in the first place. There's two things that could be happening:1. It's either broken/counterfeit/not as described/used/etcOR2. He's a completely legitimate sellerIf it's 1, you shouldn't buy it for obvious reasons. If it's 2, you shouldn't buy it for less obvious reasons, namely:1. You'll be able to get the parts for the exact same price2. You won't have to worry about return policies if it breaks3. You'll be able to customize your specs4. You'll get the experience of building a PC5. You might be able to get the parts on saleBasically, just buy all of the parts from Newegg and assemble the exact same computer. It's much safer and it'll be the computer YOU want rather than the computer someone else wants.also it doesn't have windows so you'll need to pay another $100-ish for a copy or you can also just