Beginning the first Sunday in May, the Medina's parking lot is jammed with treasure hunters, junk dealers, and regular folks who just like to rifle through other people's stuff. There's a little bit of everything here: antique furniture, vintage bicycles, handmade birdhouses, all kinds of toys, kitchenware, books and records, tools, musical instruments (it's not too difficult to coax a polka out of one of the accordion vendors). Many prices are negotiable, so don't be timid about endeavoring to bargain. With the money you save, you can head inside the main building and have breakfast at the restaurant there. The flea market is held most Sundays through mid-October; best to arrive early--say, 7:00 a.m.--because most vendors are packing up by noon.