Starbucks does have a few good coffees that they sell in the bag, but the stuff that comes out of their machines is only fair grade. People have been sold by Juan Valdez but run-of-the-mill Colombian coffees are second-rate beans. Colombian is a big seller for Starbucks, so more profit. Central Europeans are the biggest customers for top grades; they are willing to pay more. I spent a week at a coffee plantation in Chiapas, Mexico (temperate mountain climate, ideal rainfall, good soil), that produced fine coffee. For the best, the owner received up to $6 per pound of beans. You can imagine what that came to after roasting, packaging and marketing. Prices are lower now.
The peons there (many cross the border from Guatemala to pick in the western mountain areas of Chiapas) get beans and tortillas and very little money for their labor. Many are young. I had a hard time keeping my mouth shut about conditions. The owner was a former Canadian, but fit right into the time-honored patron-peon scheme of things.
Th United States (Hawai'i) produces small amounts of good coffee from the big island; winy and mild. When buying, check the label carefully; much so-called Kona coffee is blended with beans grown elsewhere.