It is difficult at the best of times with properly cured buds to identify them. But as a general rule of thumb, many sativas tend to be smaller buds and will have more hairs than indicas.

But again, this is just an overgeneralization of buds. I suggest asking your guy if he can ask his big boss man for a specific indica strain. Failing that you can try to find a new dealer who doesn't have his head up his ass, but this is generally hard to do.

And then, of course, you could always grow your own sweet stinky ganja..