We upgraded to a toddler car seat a few months ago and the old one is just sitting in the house gathering dust. It’s in perfect condition and has never been in a crash etc, so it seems wasteful to sell it. Haven’t checked expiry but I can’t imagine it’s expired as it’s less than 2 years old.
What did you do with your old ones? Part of me is a bit paranoid about giving it away just “in case” there something wrong with it that we don’t know about.