All services are graphically unattractive, user interfaces unintuitive and complicated, customer contact non-existent (most prefer to contact me in DM on Nostr or SimpleX), lightning purchase is fine for small amounts, otherwise on-chain payment is more than fine.

In short, I have wasted a lot of time setting up three marketplaces but so far none have the appeal of an Etsy, Shopify or eBay.

For now it is still too early for a real marketplace on Nostr, maybe later.