Use /shop to go to the general shopping area.
Claim a location for your shop using a golden shovel.
Place a chest
To create a selling shop: (prices are diamonds and netherite ingots)
While looking at the chest type /shopkeeper
If you want a non-villager shopkeeper, enter the type after /shopkeeper.
To create a trading shop: (prices can be any item)
While looking at the chest, type /shopkeeper trading-shop
Create a shop front that makes it easy for players to know what you are selling.
Check nearby shops if you are looking for pricing ideas
You can purchase a villiager egg from the admin shop to create shops that are not directly next to chests. Place a chest and then right-click with the egg in a nearby location to place the shopkeeper.