Security Sannce via eBay offers the Simply Fit Core Workout Board in Green for $14.19 $12.59 with free shipping. (Walmart charges about a buck more for Orange.) That's $6 under our mention from two weeks ago and the lowest price we've seen. (It's a current low by $9.) As seen on Shark Tank, it measures 24" x 12", can support up to 400 lbs., and engages your core, legs, and back.