Get the PostruePro Lumbar Support for $0.60 at Amazon–97% off. Shipping adds $3.98, bringing the total to $4.58 shipped. Compare to $21.29 at eBay.

Use the lumbar support in the car, at work or at home! The elastic strap easily attaches to any seat and can be moved up or down for the perfect fit.

Angel Sales PosturePro Lumbar Support (reg $19.99) $0.60
Pay $0.60, plus $3.98 shipping
Final Price: $4.58