I thought my baby hated it too until I reclined it back as far as it could go! But Facebook marketplace is the way to go!
Definitely sell it. Check out Goodbuy Gear: https://goodbuygear.com
You can even sell on Mercari for local pick up and even offer up for local pick up!
Agree, marketplace. I was going to say once upon a child but they’ll rob you for what they’ll offer. lol
Try Facebook marketplace