I've found this to be true in most cases. At least, when dispensaries are involved. I know of one, very rare, extractionist that only charges his patients $10/gram. But... he's a real rarity.there is a clear and obvious reason why folks like Prime can command more for their product. Its simply because its superior (or at least is in this case).
The 'real good stuff' can go as high as $110/gr at a dispensary and never goes on sale. At the opposite side of the spectrum, the house stuff can go for 4/$100 nug run (if on sale). Let's just say the difference is unreal. The $110/gr is rosin. The 4/$100 is BHO. Big diff in taste, purity and all round goodness. But there are a couple of extractionist in the middle of that price range that have solid product and the price is not much higher than the house run.