Walmart offers the Gold's Gym Circuit Trainer 36" Mini Trampoline Circuit Trainer, model no. 35-1626GG, for $22.19 $22.45. Choose in-store pickup to dodge the $5.99 shipping fee. That's the lowest price we could find by $13, although it was pennies less a week ago. It features a polypropylene rebounding surface, and includes two resistance cords and an electronic monitor that measures time, calories, and number of jumps.