Markets
Civilization thrives on trade.
Nostrum coinage is accepted legal tender across the world, and so prices are listed in pence.
Markets
Every major city has its own market, which are variants of this one. They might have equipment not otherwise for sale, or just some things are more expensive than others.
Luten-Augusburg
Luten-Augusburg has two major guilds that control everything made in the city: the Blacksmiths' Guild, and the Tailors' Guild. If your character is on the wrong side of one of these guilds, then it costs twice as much to buy their goods in the city.
Luten-Augusburg, like Redwine, sells armor made out of treated wood. Treated wood is as inflexible as iron, but under sufficient force still shatters like wood.