Yunnan province is more famous for it's tea (especially Pu'er, which I like but rarely seem to drink). However, the coffee they produce there is really good.
I've drunk Yunnan coffee in the cafes and hostels in those traveller-friendly Yunnan towns of Dali, Lijiang, and Jinhong, and also in Sichuan and Guangxi provinces, and always wondered why it's not more widely available elsewhere in China.
And now, suddenly, it has appeared in Băi'ān Gòuwù (百安购物) department store supermarket. I bought a pack a few weeks ago, and went back for more yesterday. There were only 3 left, so I got them all. Hope they restock...
Cost: 18.7 RMB for 250g
Where: Băi'ān Gòuwù (百安购物) department store supermarket (imported food section), at Nánguān Shízì (南关什字)
For more places where ground coffee is available, go to the Imported food and drinks page.