I had no idea pot was selling for those prices!  (BTW, welcome to Eugene...and life!, George) since the day I got here 40 years ago, I've been in a circle of folks living a lifestyle copacetic to growing marijuana. (hugs if I know you) not necessarily involved, but I never paid  for what was some of the earliest, best damn sensimilla available (yeeHA! had to explain to people what it meant, and yes - big boast)  these folks were some of the innovators.  it was the women who "suggested" cloning - we'd nicked plant starts forever.
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 I would guess the money to be made by the dispensaries was excellent at first, slowed down and now is shrinking slowly.  there are so many, some owners are their own suppliers and  there is a lot of garbage in the dispensaries.  with the hub bub of dispensary owners not paying that 25% tax to the gov, I went to several...smelling bottles and chatting.  no -one knew anything about a tax not being paid and there was one passing crap as a "thai stick".