Quote Originally Posted by Florian View Post
When you use the rules to create a community, you randomly roll for what items of which kind are available to buy for the current month. That is what is available and known, changing every month.
It doesn't say that anywhere in my DMG. In fact it says pretty much exactly the opposite of that:

Quote Originally Posted by DMG
Anything having a price under that limit is most likely available, whether it be mundane or magical.
So maybe you can tell us what page this hypothetical rule is on in the DMG.

Or perhaps you can tell us the hypothetical rule that allows PCs to know an item exists and therefore look for it in the city?

Absent that, I'm going to have to stick with "The characters know what items can be created/wished/bought because knowing what items can be created/wished/bought is just something that is assumed everyone relevant knows."