Currently there’s no agreed upon spec for quantity, but it wouldn’t be difficult to add (most simply: [“quantity”, “<number”]). Same with automatic deletion, and it could be done either after a certain time frame or immediately upon receipt of payment. 

 Sounds good! Manual deletion is probably fine on second thought when thinking from a FB marketplace/ Craigslist standpoint. 

Deletion worked as expected in Shopstr. But the deleted listing still appears in Amethyst. Do you know why that is?  

 Deletions are handled more like requests rather than hard deletes. There’s no way to guarantee that the deletion request goes through for a particular relay, so depending on your relay list it can still show up in other clients. 

 That's interesting. Thought the Mutiny Blastr relay would make sure that everyone is aware of the request but guess not.  

 It might make them aware of the request, but a relay doesn’t have to support it.