Originally $99, Gaiam drops a selection of Scratch & Dent Ergonomic Balance Ball Chairs to $59.99 each. Through Sunday night, enter 20% off coupon code JINGLE and pay only $47.99, the lowest price we've seen. The chair is designed to strengthen core muscles and improving spinal alignment as you go about your daily office routine. Note that these chairs have "varying amounts of cosmetic damage and scuff marks," so if you're looking for a flawless chair, sit this one out. However, it has received 5 out of 5 stars from a buyer who says the scratches are only noticeable upon inspection. There is no sales tax (except CA, CO, OH). No returns or exchanges.