The desire for a drink or smoke knows no budget limit, and traditional currency goes out the window once you find yourself cash-strapped and craving a blunt. While there are plenty of heartbreaking NSFW stories about the forms of payment people offer when in the throes of addiction, those feel both exploitive and voyueristic.
However, there is a bizarre middle ground between the traditional cash exchange and a Trainspotting style scene of self-destruction. Anyone who has sold green or prescription drugs for extra cash has likely encountered creative offers in lieu of cash.
Ex-user of opiates here.
My dealer would only give me the drugs if I gave him my blades and allowed him to check me for any cuts. I was in a seriously dark time and he helped me in a lot of ways. Eventually, once I started to get better, he refused to sell me any drugs and also made it clear to his friend dealers that I was blacklisted. One of the reasons I turned my life around.