I picked up a few years ago a refurb Dell for a little over 200 USD (with shipping 215).
It is one of those big beasts with a number pad and decent GPU. I use it as a gaming PC. I was just last night playing Dead Island Riptide with default settings. It is probably the best computer purchase I have ever made.
My advice: keep an eye out for Dell refurb deals on slickdeals.com. They occasionally have half-off deals, which is what I scored.