The well known and DAO governed exchange Bisq is considering to relist/support Grin.
Bisq did allow trading of Grin in the past, but because of lack of payment proofs and the many hard-fork upgrades to Grin they stopped supporting Grin.
Grin as privacy focused, community governed cypher-punk coin fits in very well with the vision of Bisq. Bisq like Grin is community governed and focuses on the coins that actually matter.
If like me you would like Bisq to start relist grin, you can give the DAO proposal a thumbs up here :
See below the full discussion and history of Grin listing and de-listing at Bisq: