I just built a new PC and want to sell it. What are some good practices to follow? I know not to accept checks or money orders, but what about PayPal? Plus, if I only deal in cash (which I would normally prefer), how do I deal with having that much cash on myself or the other person. Worried about getting robbed, or scammed with PayPal. Don't want buyer to come to my house, but I built a tower. How, do I demonstrate that it works without bringing in a monitor and all the trimmings? Plus, do I need to install an app like 3D mark to prove it works? I already bench-marked it, screenshot the results, then removed them.