Amazon offers Prime members the Cadon Toy Dyson Ball Vacuum Cleaner for $22.49 with free shipping. (Toys"R"Us has it for the same with free in-store pickup. Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $7.36.) That's the lowest total price we could find by $8. It features realistic suction noises, simulated cyclone action with spinning balls, small suction action, and requires four C batteries (not included).