Kira

Really, this, but if you care more about logistics and you're going to be cynical expecting some to give away something like a weapon or a scrap (which is a valuable concern) then you might as well see it more as a fun gambling activity. You give something of value (hopefully) and you either get something better or something worse.

https://www.youtube.com/watch?v=GaWlGIvgJ6w