In Utah/Idaho/Wyoming we use https://classifieds.ksl.com/ This web site is set up to run on an state in the USA. However, KSL is run by leftist and RINO's, so you can't sell things that go against leftist ideology, such as guns and ivermectin. I would prefer a more practical Nostr Marketplace on Amethyst over KSL. Even a stand alone Nostr Marketplace app that has all the categories of KSL classifieds, and is searchable like KSL.