Amazon offers Prime members the Radio Flyer Pro Glider, model no. 545, for $28.37 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $8.30.) That's the lowest total price we could find by $42. It features a footbrake, E-Z glide wheels, and 60-lb. capacity.

Update: The price has increased slightly to $30.70.