I see them at Walmarts on occasion, right inside the glass cases. Obviously this varies from store to store, but they were $48.xx when my friend bought his back in February or something.
Last time I saw any in CT was a couple of Sears here and there. Don't think there are any left, but it's worth a look, given their habit of not marking items down.
My local Walmart has had 1 left for months that I have them haul out every once in in a while for a price check. Still $59.99. I hate my Walmart. They don't clearance anything.
Not sure where you are located, but I saw a used one at the local Play N Trade here in Cary last Thursday. (first time I've ever seen one in any store actually)