i dont buy anything from raves thats me though, imo most of the individuals dont care what they give to anyone at raves. not even just raves have to be careful who your getting goods from any where imo. you may get lucky at times at raves/parties but its not worth it ime your still chancing things and possibly your health, im paranoid about drugs so i dont trust many.
i usually just have my drugs set up way before a event so i wont have any worries, and get them from someone i know very well, someone reliable and trustworthy. plus i have consumed what ever compound i take to a event before so i know exactly what im consuming. imo its a lot easier and safer.
if you want the mdma experience i would start with getting a test kit and use pillreports. i wouldnt consume any stamp/powder mdx without for sure knowing its mdma/mda and not meth, pipes(bzp/tfmpp) or even more harmful compounds. i have had some pipes a couple of times and take my word its not worth it at all, want to know what your taking for sure.