LightInTheBox offers the RC Inflatable Balloon Novelty Flying Shark in Blue or Fish in Orange for $16.82. Coupon code "TOY4008700" cuts that to $11.82. With free shipping, that's the lowest total price we could find by $18. It features 360-degree control via infrared remote.
Uncheck "Add Shipping Insurance to your order" during checkout to remove the 49-cent fee.