Those weapons will be gone when I release next small patch. Some can be sold right now because I just copied ordinary weapon you can normaly use, tweaked some stats and gave it the NPC tag so that wepon has a sale price. This wouldn't matter if I didn't forget to make them invisible in your inventory, since you wouldn't be able to sell them anyway but right now, you can just recruit certain NPCs who have those weapons and sell them over and over again to get some quick money. This is a bug ofcourse so it is up to you to decide if it feels like cheating or not.
Ichor can be given to Mr. White. This is a minor spoiler though.
If you keep killing humanoids (kobolds and bandits) and kill around 100 of them (your main character has to deal the final hit, otherwise it doesn't count as you killing them), Mr. White will appear near your hideout and give you strong weapon and armor. After that, he tells you to visit him. Go to the forest area with ruins that have stairs to the basement. Go inside that basement and talk to Mr. White. He will sell you very strong weapons and armor together with plenty of ammunition. He will also train you if you have certain items. You can give him the Ichor container and receive permanent upgrades. He will also unlock large semi-random dungeon you can enter from the basement he is in.
This will be different in the future as I add more quests and locations.