I think I want to get a neurological exam, but I'm not sure how to go about it. I am a 28-year-old male.

I have a personality disorder or a mental illness or a mental disorder. I am not sure which. I am waiting to see a psychiatrist in about a month and I am sure he can give me some answers. 

I feel it would be worth it to undergo some sort of brain imaging. I am sure he could refer me to a neurologist, but my insurance would never allow it.

What is the range of out-of-pocket costs I can expect for the various techniques?