I tried looking up the forums, found nothing. I know we have a market, but putting items up there could be a pain. Plus, a physical shop looks better, gives player a chance to loiter around, maybe picking up an item they didn't plan to in the first place.
No, we don't. Putting up items on the market is actually not a pain . It is quite simple and fast. Just do /market listings to see the market, its commands, your items currently up, and more!
As @YourMCGeek said, we dont have one. The first reason is NBT. Most shop plugins dont support NBT. This means some items would break when someone sell them. Like Tinkers Tools, etc. And to be honest the /market plugin we have is perfect because you don't need to remember who sell the items and jumping on islands finding the shops. Marking as solved because its not a support.