Kevin, like Bob said, ebay is a very good source and I check craigslist often. I picked up two Model 50 Duncans at an antique store (someone made them into lamps). There are some nice ones at the antique store in town but they are way out of my price range. My first meter came from a local yard sale and that started my madness. Also like Bob said shipping can make a good deal turn sour, Park-O-meters are about the lightest at 12 lbs and not too bad. Duncans and Millers are heavy at 20 to 29 lbs. 32 lbs for one of my double meters. Good luck, I'll answer any questions I can.
Mike