TomTop offers the Carevas Electric Muscle Stimulator Set for $19.99. Coupon code "MD135" drops it to $16.99. With free shipping, that's $10 off and the lowest price we could find. It includes an abdominal pad, two body pads, and three controllers.

Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily. This item ships from China and may take up to three weeks to arrive.