BuyDig offers the refurbished BenQ MW519 3D-Ready DLP Projector for $289. Coupon code "AprilShowersSave5" cuts it to $284. With free shipping, that's $194 under the lowest total price we could find for a new unit. It features a 1280x800 native resolution, 13,000:1 contrast ratio, 2,800-lumen brightness, and HDMI output.
Note that no warranty information is provided. Also, although BuyDig's offices are currently closed, you can still order at this price and the order will be processed on April 23.