I frequently fly international with zero checked bags and about 5lbs of carry on. I would love to be able to do so for $99 if someone wants to on-sell my check

I frequently fly international with zero checked bags and about 5lbs of carry on. I would love to be able to do so for $99 if someone wants to on-sell my checked allowance. After reading the article I see the pitfalls I had never thought of, and would obviously want some extremely, extremely clear legalities to make it very clear the bags are not mine, and I'm not bringing them into any country. No, I did not pack them and, no, I am not bringing them into your country.