Walmart offers the Gold's Gym Circuit Trainer 36" Mini Trampoline, model no. 35-1626GG, for $29. Choose in-store pickup to dodge the $4.97 shipping fee. That's lowest price we could find by $16, although it was $2 less in November. It features a polypropylene rebounding surface, and includes two resistance cords and an electronic monitor that measures time, calories, and number of jumps.