Well up until about 2 weeks ago this was a master set of promos - coetesy of Gimli

So there are silver (cheapest) then the
cards inc set (no foil, about the same price as the silver but rarer)
Red (worth about $50-$70
Gold (apparently worth $90 but recently went for $45 - sorry Gimil, I was going to bid... but then I spent my money before the auction ended)
Green and
Blue
Which are worth about $200 a piece (per set) maybe slightly more.
Exactly - that's why I only have the silver and cards inc sets!!!
Then a couple of weeks ago the san diego comic con binder came out - including a new base set (with holofoil stamping) which included a promo set in this new foil - so that makes another set.
So in all 7 sets of 5 cards... hooray for LOTR which had one set of 3 cards (for most sets at least).