This car seat from Safety One is grossing about 900 sales per month. With massive 1844 customer reviews and an average of 4.3 positive reviews, it seems to be very popular with the parents. Check out the price here.
Graco 4Ever Convertible Car Seat is indisputable first rank in terms of sale. It does about half a million dollar sale per month. It has impressive 4.7 positive reviews out of 985 customer reviews. This best selling car seat also boasts of prized Amazon Choice logo for the search term Graco 4Ever Car Seat.