I personally believe that slabbed platinum would be a waste. You already said you are planning on platinum going up which means you are buying them as bullion. If you go to a dealer, He is going to offer you 90-95% of melt because in a worst case scenerio he can sell them at melt and make a little money. If you buy them as bullion and then try to sell them to a private person, chances are they are buying them as a bullion investment also. I am sure there are some people out there but not to many collect platinum as a numismatic coin. In the end, you do what makes you happy but if you are just playing the metal market then I would not pay the mark up for PCGS. Example: if gold is $1160/oz and I buy 1 oz. if gold goes to $1190/oz, I made $30 profit. If I buy a PCGS coin which is marked up $30 over spot ($1190)to make up for the PCGS grade, if gold goes up to $1190 all I did was break even.