Mighty Mule FM231 Wireless Driveway Alarm – Electromagnetic Vehicle Detection, Indoor Receiver, 400 ft Range, Expandable, Battery Powered, Easy Installation, Driveway & Property Security System Pack of 1 is up for auction in Tools & Home Improvement. The current bid is $5.00, 93% below the $72.98 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.