My baby girl is growing and her days in the infant carrier are coming to a close. With that in mind, my wife and I decided to buy two convertible car seats for her. Although I am frugal, I am not going to skimp on something as important as my child's safety and the inconvenience a poorly designed seat would cause me. For a that reason, we bought a Britax Marathon for our family vehicle and a Britax Roundabout (smaller and cheaper) for my truck.
Using Amazon: We saved about $75 from what Baby's R Us wanted plus we probably save another $25 in sales taxes.