On Sundays, Chichi transforms from a sleepy hilltop town to a bustling meeting place to buy, sell, and trade all goods Guatemalan (Thursdays are also market days). Although it sells artesania for the hordes of tourists who file through each week, there are also stalls for the locals selling anything they might need. It's also a great place for people-watching. Indigenous people in full traditional dress come here to do business. It is usually considered offensive to take photographs, but if you take photos from a distance and are discreet, it can be okay. If you want a photograph of someone in particular, approach them and offer them a tip; they will usually allow it.
For under Q200, or $30, I bought an armful of goods. I had about 4 hours before my shuttle returned to pick me up, so there was plenty of time to go up and down the streets. Even so, I think it is impossible to get completely familiar with all there is in Chichi in one day.