They only last 5 years before they expire. It depends on what kind you want. If you want a dual system ot one that is smaller that hold only the carseat and no seat for when they are older.
U should get a stroller and car seat combo. And get Graco
Thx I did get one but it called baby trends expedition elx travel system
Get the jogger style they're lighter and move easier they have car seat combo's
Get whatever one you like brand wise make sure the seat can lay down and a carseat is in included as well
Its not about brand