M.B.
I know car seats can be a huge expense but I think it is one thing you shouldn't skimp on if possible. The only problem with used car seats is you don't know if they have been in an accident. After a car seat has been in an accident they are no good. If you can find a way to afford it ( ask for help from family for an early birthday gift or something ) the Britax car seats are definitely the best and most safe. I have one and love it. Unfortunately Britax are the most expensive but worth it if you ask me. They will last you for years so really you get a lot of use out of them. Good Luck! :)