Diapers.com offers the Britax Roundabout G4.1 Convertible Car Seat in Silverlake, model no. E9LW33L, for $125.99 with free shipping. (Amazon charges the same.) That's the lowest total price we could find by $18. This car seat is designed for children rear facing from 5 to 40 lbs. and forward facing from 20 to 55 lbs. It features a tangle-free 5-point harness, three recline positions, and quick-adjust 2-position buckle.