Sometimes your "weed guy" will actually sell much more but simply not tell you. If you ask (the right way) they might reveal this, or connect you with another guy but I would suspect a lot don't want you (or anyone) to know they deal in the "harder stuff".
I have had that happen once or twice. But also I've encountered a lot of people who "aren't drug dealers", who only sell weed to their friends, basically so that they can smoke for free. This type takes the "not a drug dealer" thing seriously, and if you ask for large quantities or other stuff they will say no.
