I was lucky enough to pick up my set of 10 decks for $495 back in January.
Then shortly after obtained a single Unbranded Black Reserve for $300. So yes, the after market re-sale value is quite up there. I do see people selling complete sets for $900+ but in realty, who pays that kinda cash for collectable cards unless they really want a set to complete their collection.
But it's like anything, the more and more they sit, the more and more valuable they become. Word has it that Mr. Jackson is coming out with a v2 of the Reserve Notes, just image what the first version will be worth after that...