If you are running out of ammo and supplies and do not have enough caps on you to buy things in Fallout 4, here’s a trick you can do at a specific vendor in Pyrdwn called Proctor Teagen. This trick works on other vendors as well but Teagen has the best stock so we tried it out on him.
This involves buying an ammo called ‘missiles’ from him and without accepting the transaction sell one missle back to him and then all of them so that it glitches. Vendors’ stock and caps will be replenished after you sleep for 24 hours.
Here are the steps to do that.
1) Buy all his missile stock
2) Sell back 1 missile
3) Sell back the remaining missiles
4) One missile remains in your inventory and you can keep selling it until you have enough caps.
5) Clear out his inventory
6) Accept transaction by pressing square on PS4
Here’s a video that shows how it works with another vendor. (Thanks, PowerPyx)