It's worth exactly how much someone else is willing to pay for it. Realistically, not much. It'd probably be worth more to you to just use as a beater than it would be monetarily to sell it. You might be able to get $100 for it. Maybe. Probably not.
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz