Waist Twisting Machine with LED Digital Monitor & Bonus Yoga Mat – Ultra-Quiet 20 dB Ab Twister Board, Non-Slip, Heavy-Duty 330 lbs Capacity Home Gym Equipment for Core Training & Belly Fat is up for auction in Sports & Outdoors. The current bid is $2.50, 92% below the $29.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.