Hmm? Dream seems to always be up and has a number of vendors, but is there anyplace that's on the rise or worthy of becoming a vendor?
I know Libertas needs a special invite (no idea how to find that), and the others I've found are Wallstreet, Tochika (a dozen mirrors that are never up), Zion, and Aero (also never up). I don't vend cannabis, so GGMC is off the table.
Aero is good. Find their mirror address starts with aerogucked.... It's in their forum or should be in their sub as well.