As you're probably aware by now, there's a pretty crazy exploit in Fallout 4 that allows you to glitch the barter system, essentially tricking vendor's into thinking they owe you a ton of caps. Referred to by many as a "bottle cap glitch," the exploit more allows you to purchase everything in the vendor's inventory with the bottle caps they think they owe you.
While you can find a full written guide for the bottle cap glitch here, the video above shows how to do it for you visual learners out there.
