This is not my auction, and I don't know the seller. There are four varieties of encased Silver Dollars from Harrah's. This is the most common. At one time I thought these were the R word, but now I see them on every few months. It's a very nice piece of Harrah's memoribilia. IMHO it's "worth" about $50.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=7109&item=3973220753&rd=1