13 Deals offers the Eternal Back Stretcher Pro for $14.99. Apply coupon code "FIXMYBACK" to cut that to $11.99. With free shipping, that's $3 under the lowest total price we could find for a similar item elsewhere, excluding the below mention. It purportedly relieves back pain and releases back muscle tension. Features include three adjustment levels and a 10 trigger point massage top.

Need more than one? Add two to your cart for $19.98 with free shipping after the above coupon ($9.99 each). Both deals end March 31.

A close price: NJ-Store via eBay offers a similar item for $12.46 with free shipping.