I'm not sure what this is asking, or if this is the best use of a coin section of the forum. How about we have a thread just for numismatics (yeah I'm a currency nerd) Frankly, if you have a rare coin and want to have it appraised, chances are its been sold on ebay before, just do a search for completed auctions. Of course there is some debate about the price discovery function of ebay, but that will tell you if you have a million dollar coin or just a regular generic round someone made to imitate one.
How about a coin pr0n thread? Pictures of coins we have, pictures of coins we want, it could aslo be called "you want, you lose" Here is my contribution of the 2006 reverse proof eagle, one of my favs.

























@ mr foley how much consideration is given to the value of the actual nickel and how much is numismatic?
@fightergael its ot rare at all I just like the style and the minting.
For a rare one for eagles in the special edition I would use a 1995-w eagle as an example, sine that is the lowest known mintage for all eagles (just staying with the eagle theme also)
with a mintage just over 30k this is the most rare of the eagles. It was originally packaged with gold coins also, but none of the gold coins are as valuable as the one eagle. If the game is you want you lose, I lose to this one because... I want!