After seeing the marketplace in the main idea at you created a variation with a few ideas of my own.
Instructions:
The pictures should be enough for that:The butcher's stall (with Redstone as "blood effect" on the battle block)

The greengrocer (with growing vegetables in the stand)

A weapon shop (here I still lack an idea, what I can use as decoration - currently only picture frames used)

The armourer (with exhibits on armour stands)

A dealer in melons and pumpkins

Is the gun shop owned by a blacksmith???
neee you know this is nh farmer
Hello ^^,
a very nice market in itself. But there is still room for improvement.
First, the market stalls are all in a row, which was certainly not so common in the past, because everyone has chosen a place where he can best sell his goods. Then you could build different market stalls, e.g. a tent, a flying merchant with his wagon only, a big cattle market, etc.
Just keep trying ^^
Mfg Chrissel