CowBoom offers the used Sony PlayStation 4 500GB Console, model no. 10034PS, for $279.99. Coupon code "PS44915" cuts it to $229.99. With free shipping, that's $169 under the lowest total price we could find for a new one, although we saw a used one for $6 less in December. It includes the system and power cord.
Note: No warranty information is provided, and this item may have minor scratches and/or be missing accessories.