I personally wouldn't front the money without getting product back in return. Only because I have been burned in the past doing that, but the way I see it, if your dealer does give it to you, and it weighs up, and you are happy with it, then who cares.

Trust me though, it is better off for you to buy from a dealer yourself. This person you go to doesn't sound like a dealer. He/she sounds like the "middleman." That's where you give them the money, they go and get it from a dealer, then bring it back to you. From my experiences, they like to either take a bit of money for their efforts, or pinch (steal) some from your bag.

Like I said, find a real dealer. This one is a middleman and there is a good chance they are taking some for their effort. Be cautious, find a new supplier.