2008 1 oz 9999 silver maple leaf?

Hi, I just acquired a beautiful Canadian coin, RCM sealed as above with a privy mark "f12", Fabulous 12. I search everywhere I knows on the web but nothing mentioned or any details about any coin set like the 2007 f12. Can anyone tell, Is this coin part of a 12 coins set? Are the remaining 11 coins/countries the same as 2007? If not, which are the other 11 coins/countries? Does anyone can tell whats its worth? Thank you very much. qmike.sg@gmail.com