To test if real. The real Argan oil is sold in Glass bottles, usually dark colored. Should have a light nutty smell. Not too strong or over powering. Apply a few drops to the hand, it should not be slimy or sticky. it should feel light almost like water, smooth and silky consistency, and when applying a few drops should absorb into the skin and not just sit on the top.
You can buy the argan from the stores in Morocco. In fact you can use the cooking Argan, the only difference is the cooking Argan is said to be worked more, to remove more of the oil, and the kernels are roasted before they are crushed. Thats the only difference... They say because it is heated up when roasted then it looses its affects. That is not true, Just live olive oil you can heat it up and it still is the same. When it cools it returns to its normal state. So I would personally go for 100% Organic Cooking Argan oil. Much cheaper you get more for your money. the only difference i see, is slightly darker colour by one shade and also a more rich nutty scent.
Because it is for cooking, and the kernels have been roasted it means you can consume it, consuming Argan oil is very good for you, good for the liver, gall bladder, stomach, the heart, blood vessels... and a whole list. So it works out to be better as you can use outside and in :) Hope this helps.