Data from Washington State: https://data.openthc.org/ (a small side project)

It's mostly supply side (B2B) deals, the data about crop and harvest they provide is worthless. I could add in all the retail transactions (I just don't load them every month).

You can get it too, FOIA request to the LCB, they'll send you a link to some zip files. They drop new bits every month.