Where can I buy and sell used airguns in the US?

The biggest used airgun classifieds are Airgun Nation (airgunnation.com), GTA Yellow Forum (gatewaytoairguns.org), and the Airgun Warriors classifieds.

GunBroker also lists airguns. Established airgun dealers like Airguns of Arizona, Pyramyd Air, and Krale (international) sell vetted used guns with limited warranty. Local Facebook groups and Craigslist work for in-person sales but offer no buyer protection. Stick to community forums where sellers have feedback history.