Ebay offers Retrospec Bicycles 6" Toddlers Balance Bike for $20.99 (reg $32.99) with free shipping.

Product Description:
Toddlers already think they own the place. Cricket helps them control their speed and develop bilateral coordination while keeping their feet constantly in touch with the ground. Develop the skills they need to walk, ride, and go-go-go! 

• Dimensions (Overall): 19.5 Inches (L), 14 Inches (H)
• Weight: 3.7 Pounds
• Holds up to: 44 Pounds
• Suggested Age: 12-24 Months
• Bicycle Frame Material: Steel
• Seat Material: Polypropylene
• Assembly Details: Adult Assembly Required, Tools Provided
• Wheel height: 6"
• Bicycle frame size: 16.5"