First time GHB , getting scammed?

Hello everyone , I have been wanting to try GHB for a long time , unfortunately in my place it's really difficult to get , A supposdly trusted source showed me what was supposed to be 20ml worth , but the quantity is 2ml. Saying it is pure and concentrated :/ Am not that smart ,but does that make sense? After reading alot and planning to have 1ml for the first try, getting 2ml is both confusing and worrying, the guy said to use a single drop from a small bottle he gave me at first . So is that right, can that be pure GHB ? Planning to try it on the next weekend , which will give me some time to re think about my life choices lol.

Thanks all ,