A marketplace/classifieds section in Stacker.news would be great, similar to ~jobs. People could pay sats to advertise their product/service. Payments could be peer-to-peer (non-escrowed) or use an escrow similar to Microlancer.io. Wrote about it here: #11418
But I'm thankful for any KYC-free Bitcoin marketplace, whether in Telegram, Matrix, Stacker.news or a specialized website.