In the March issue of ShopSmart, put out by the publisher of Consumer Reports, experts analyzed used baby gear to determine “when you can gratefully say yes and when you should gracefully say no thanks.” I am devoting several posts to discussing their findings. (I wrote about used baby bath tubs here.)
ShopSmart has this to say about hand-me-down car seats:
Safe: A car seat that has all its original parts and labels, has never been in a crash, and fits your car and child is OK.
Not Safe: Products more than six years old are outdated, and most likely too run down to be considered safe.