eBay has the Balance Ball Chair with Back Support for Home and Office in $49.95 with FREE shipping.
Product Features:
- Includes 52 cm exercise ball and hand pump.
- Multifunctional chair includes removable back and stores easily.
- Lockable wheels keep your stability ball chair in place for safety – no rolling away!
- Designed to support up to 300lbs and heights of 5′ – 5’11”.
- Made of anti-burst PVC plastic.