I bought one for a fiver in the market by me. my mum bought one for £25 and mine works so much better! I collected all the crystals for a few months and put it all in a joint. It didnt look like much, just a thin line of dust. I put some tobacco on it and smoked it thinking its gonna be shite. I havent been that wrecked since i just started smoking! I couldnt move ny part of my body except my eyes! Fucking brilliant!