Walmart offers the Spalding iHoop 54" Glass Basketball Backboard and Speaker System, model no. IP556, for $448. Shipping adds $49.97, or choose free Site-to-Store. Even with shipping, that's $103 under our March mention and the lowest total price we've seen. Sales tax are added where applicable. It features a 54" backboard, steel board frame, and a 120-volt 2.1-channel speaker system including two 3" full-range speakers, a 5" subwoofer, iPod dock, and more.