You love "Antiques Roadshow," the beloved PBS program that's been on the air since 1996. And you have an heirloom that you think might be worth something. Remember, this is the show where you could find out that the photo you bought at a garage sale for 50 cents is really an Ansel Adams original. But don't quit your day job just yet. First, you'll need to get tickets and choose an item that can stand up the to the appraisers' scrutiny.