Flea markets are great places to find bargains. It makes me feel great whenever I find something that I get a deal on. (Also, this is the only place I feel comfortable actually doing bargaining.)
The De Anza College (http://www.deanza.edu/fleamarket/) in Cupertino has a huge flea market every 1st Saturday of the month. Parking is $5 on campus. This is the real deal, you can shop for anything and you get the professional vendors mixed in with the regular folks. Great place for buying plants, I got a rare tomato for $2!
This is a community fundraiser for student activities and programs. Do you need any more reasons?
Which one is your favorite flea market?