Amazon offers Prime members the Kurgo Skybox Dog Booster Seat in Black/Orange, model no. 00044, for $32.39 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $9.70.) That's the lowest total price we could find by $15. It measures 16" x 12" x 8" and is designed for pets up to 30 lbs.