Amazon Lightning Deal: Graco Affix Highback Booster Seat For $54.39 Shipped Lightning deal valid until 8:59pm EDT or while supplies last. This was $71.99 earlier today, $78.98 last week, and it now the lowest Amazon price ever. -AFFIX Highback Booster Car Seat with Latch System offers a secure connection keeps booster seat properly in place Want to continue reading this post? Click here!