Ignore any name he tells you. If it looks like some awesome herb than buy it. If you think you could get the same quality elsewhere for cheaper, then don't buy it, but if YOU think it's good enough to buy, then buy it.

People will toss out any name they hear to make better sales, and keep in mind he says, "he can get it." That sounds like he is nothing more than a middleman and may be saying it's that much, to pocket some profit. Buy straight from a dealer, if you can for the best deals. Middle people like to take a bit of profit for their work, in either money form or pinching from your bag. I'm not all of them do this, but just be careful as a lot of them do.