Unable to buy stuff from npc vendors in game

[Hollowborne]

I don't know why this is or if I'm just dense but when I try to buy camp supplies(for example, I've tried other things) from inn at Vale or the blacksmith it won't let me purchase it even though I have the money to buy it.  It will show the item with the amount required to buy but when I click on the "trade" button all that happens is the coin dropping sound and nothing else.  I don't get the item, I don't lose money.  What gives?

[FrankFore20]

if it is only camping supplies, you are most likely at your limit.

[Gallenger]

Your camping supplies are limited by difficulty setting.   Once you hit your limit you can't buy anymore. 

[Hollowborne]

OK, thanks very much!