Sigh, I miss New York.
Una and I used to visit flea markets almost every weekend in the warm months - the Antiques Garage on 26th street and 6th avenue, the open air market further east on 26th, the Hell's Kitchen Fair at 40th street and 10th avenue, a small gathering on 17th and 6th, and even occasionally headed to Brooklyn. It was one of our favorite things to do and oddly (sadly), not a popular thing out here. Though we have Elkhorn - which is tremendous - it's only open four times a year.
For those of you who do live near a weekly flea market, check out this article on Eddie Ross (of Top Design runner-up fame), who is a flea market expert. Great advice on what to look for and how to buy.
Article here: http://www.nytimes.com/2010/10/28/garden/28qna.html?_r=1