The US MINT put out a beautiful 3 coin set in gold and silver celebrating the US MINTS 20TH  Anniversary. The set cam in a box and it contained 1) MS (W) for circulation, 1) PROOF(W) that was made for collectors, and the first (RP) (P) reverse proof. The reverse proof coin was the first time the US MINT ever made and is gorgeous. The  (P)  stands for the Philadelphia mint  and the (W) is for the West Point Mint.
      Here is the problem The Mint made a limited amount of these SET"S and they went up 4 to 10 times  the $$$Price. and some people made a nice profited from this. I hope to if I ever sell them; That is part of collecting, trading, and selling.
     I was at a friend's house and he showed me some coins he was bidding on; I recognized the company and took a closer look. I had down "2006 silver eagle 20th Anniversary 3 coin set". The "RP" REVERSE PROOF is worth the big $$$$$. The add look just like the real deal, but it swirled around about how it had the coin that was a "W" that didn't have a "W" and a honest person would think it was a (P) MINT or THE (RP). THERE IS NO SUCH COIN MINTED BY THE US MINT THAT IS A "W" WITH-OUT A "W". They had just put in a regular American silver eagle from a 20 coin tube. I LOVE THE SILVER EAGLES FROM THE US MINT TUBE. But they committed a fraud by saying it was a "W" silver eagle with out a "W", they don't exist. SO WATCH OUT FOR THE DECEITFUL TRICKS and happy coin collecting  Peter