Is there a place in La Paz where I could buy beans straight from farms, before they are processed? I have a couple of friends who'd want to roast their beans up to their liking, so I'd like to buy them some beans as close to the source as possible. I don't have much time to travel, so places in La Paz are preferred. I've done some research, but to no avail.
My best tip for La Paz would be to find a decent taxi driver and ask him to take you to some place where they have the beans. Offer him a bonus if he makes you happy.
Remember not to wrap the beans in plastic. They should be stored somewhere dry and cool. I forgot to take some beans I bought out of their plastic bag and ruined them.
Also remember that unroasted beans in some countries might be considered fresh agricultural product and as such can be forbidden to import to some countries..