The most expedient way to get Accutane inexpensively is to see a physician who will send a form to the indigent need program at Roche. They will provide the medicine for free if you are uninsured, indigent, willing to submit a copy of your W2, and the indications for the medicine are met. No generics are available. I imagine the drug is cheaper in Mexico.
Also once you have a prescription there are many online sources at lower cost.
Also.. have you tried a lotion called Isotret? It contains acutane and is loads cheaper. My local place I've gone to for a peal has it for order online. She had my 15 year old use it for a bit a couple of times a week. His acne wasn't bad but it really made a difference....
It's the last item at
http://www.skinhealth.com/package_details.asp?pkg=3