Don't want to give away too much of what can be found below the surface, but there should either be some sort of inn mechanic in the breathable area in the settlement, or at least the ability to create a fire and rest.

Currently, Barkskin, shield, and blur potions are all the same GP cost essentially.

However, shield is far less expensive than it's counterparts in prestige shops.

Would make sense for all of these to essentially be equal.