Baby gates, bed rails, monitors, playpens and cupboard locks guard one house for a couple of years and then come down, usually in perfect working order. It's sensible gear to buy second hand, as long as you can trust the condition notes, which is what this marketplace is built around.

Sellers describe honestly because their reviews are public, photos show the actual item, and your payment is held by Lhoop until it arrives. When your own stairs stop needing a gate, list it free and keep 100% of the price.