You can buy anything at the Tianguis in San Miguel, from underwear, to parts for gas stoves, used tools, fish, fruit, furniture, video games, and in this instance caged birds which the birdman carries around tied to his back. This market, which springs to life every tuesday, covers acres and is a jostling, noisy, crowded chaos. It is also the most likely place to buy back the spare wheel and battery that disappeared from your SUV last week.