Overstock has taken 37% off the retail price of the Crazy Fit Vibration Plate Fitness Machine, marking it down from $499.99 to $313.99. Activate our $15 off $300 coupon (expires 10/15) and the plate lowers to $298.99. Vibrating plate machines are the hottest thing in fitness. You stand on the machine and do simple exercises such as squats or lunges, but because the plate vibrates, your muscles must work deeper. The vibrations also help increase bone density and decrease muscle soreness. Because the workout is so intense, you only need about 20 minutes a day on the plate, making it great for those who are too busy to workout. These machines can retail for well over $5000, so this is a good deal. Shipping is just $2.95 and there's no sales tax.