Get unlimited regenerating loot from Pribyslavitz Arena Master
If you take a fight from the arena master, after the fight he is standing outside the entrance and makes a short walk to his chair. You can knock him out but you have to do it while he is walking or I find if you crouch right after the fight he stays still and doesn’t walk back. You can do this or you can loot him while he’s sleeping(he sleeps in the top level of the Guardhouse). Every 2 days he regenerates all items except for his Paige’s sword.
I did this at least 5 times before I got bored and his chest armor alone is worth 2.5k Groschen before the vendor lowers the price and his legs are worth somewhere around 900 Groschen.