It would likely be a one-way trip with no return, as he didn't even know the two men. Once they took the crystals, would they really return them to him? Absolutely not. Besides, he didn't even have any crystals on him in the first place.
"I don't have any crystals."
"You don't? Kid, I'm trying to reason with you nicely, so you'd better be smart about this, or else I'll tear that mouth of yours to pieces."
Chapter 720