Try to stay away from juice that has passed the hands of two people or so. Because once, the head hancho gets it from Mex, and sells it to a national dealer, who in turn, sells it to a regional dealer, who sells it to local, who sells it to a gym dealer...that shit has more than doubled it's original price easy.
If you can cut it off at the second guy, you're looking WAY cheaper than going through all these middlemen.
P