Xcceries via eBay offers the Yescom Kids' 16" Unicycle in five colors, model no. 04UBK001-16, for $37.90 with free shipping. That's the lowest total price we could find for a unicycle of this size by $2. It features a steel frame and 1.75" skid-proof tire. It's recommended for riders under 110 pounds and between 45" and 61" tall.