Yugster offers the factory-refurbished Cobra Electronics SPX 5500 Radar / Laser Detector for $79.97. Coupon code "FREEYUGBUCK" cuts it to $78.97. With free shipping, that's the lowest total price we could find for a refurb by $11. It purports to have twice the detection range and warning time of other detectors. A 90-day Cobra Electronics warranty applies.
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.