^ Seconded.
Don't buy it. There are multiple reasons for this:
1) You don't know what is it, you have no idea of effects, of possible negative reactions, duration and so on. Remember Naphyrone? It was sold under the name NRG-1, and it turned out to be harmful compound - at least to some users. If it is a mix, it gets even more dangerous, because drug interaction is one of most complicated part in studying drug pharmacology(AFAIR).
2) And don't support these greedy and crappy vendors. It is disgusting attempt to have a monopoly on this substance. By buying this, you support selling of unlabeled sunstances.