Basically, you would type the command and then click a shop sign. It would tell you if you could buy or sell from that chest shop. Potential uses:Confirming that your own chest shop is set up correctly and the item can be bought/sold.Knowing the price of commodities at exchanges, which is useful for planning of your own pricing strategy.Knowing if a given item is in stock at a store without having to spend money. This is particularly useful if the item is expensive and you are comparing prices.Knowing if you will be able to sell something on another server before you actually use the vault to move it across.Those are just a few examples. There may be other use cases I didn't think of. I also think it may be useful to have a residence flag which allows users to also be able to view the stock level. If the flag is set, they can see how many items are available and how much room there is to sell items. If the flag is not set, they only know whether they can buy/sell but no quantities.