In Lyhjem there are all kinds of merchants that Valec and the others have to deal with.
Basically, a distinction is made between:
At the general store the group gets various healing potions and other useful items. The status window on the right side shows how many items you already have of the marked item.
At the weapon dealer you will get new weapons, depending on your character level. In the status window on the right side, you can see all status changes at a glance.
Depending on your character level, you can get new armor and equipment accessories at the armor dealer. In the status window on the right side, you can see all status changes at a glance.
Larger cities often have a marketplace. At the various market stalls, Valec can barter with the merchants. If you have all the necessary items with you, you can purchase the offered item. Money is not required.