Items

Food
Dropped from Enemies, found in jars or chests, or bought from Ethel in the tavern once rescued.

Can't be sold.

Potions
Bought from Ash in the tavern once rescued and given the Recipe.

Unlimited stock.

Can't be sold.

Materials
Dropped from Enemies, found in jars or chests, or bought from Duncan in Karthas once rescued.

Used to craft equipment at Dom.

Gems
Dropped from Enemies, found in jars or chests, or bought from Duncan in Karthas once rescued.

Used to upgrade Spells at Narina in Karthas once rescued.