Use http://www.meso-rx.com as a reference to check the brand. That way you'll know what's up. What are you paying? In my experience, I've seen ranges from $.60 - $2.00 per pill. Make sure you ain't getting fucked.
Try to crush a tab with the bottom of a spoon, it should be difficult to crush. If it powders easily it may be a fake. This does not work on IP 50mg Dbol though.