Came here after reading @rheteric's article about receiving your Alchemy-Stone.
I was so happy to see this example of how the Steemit Community can support each other in the fair trading of our own products without additional fees or encumberments.
I wasn't aware of @steembay until now or the others you have mentioned but I'll definitely look at them all now.
I produced a desktop calendar at the end of 2017 ~ Too late for @steembay now, unfortunately. However, I will be producing a 2019 Calendar and would love to be able to sell it here at Steemit.
Market Place ~ Undecided until I look at the other places you have mentioned, as to which venues would be suited for more highly priced items. Any hints? Because I also have some gems that I'd love to see go to homes where they would be loved, rather than remain unseen in my studio. 🦋Like Gillian @gillianpearce I'd like to place original artworks on a Steemit