Not only were they all over market, but every time I catch an episode of the Nate Berkus show I see them on his set.
I find them to be a bit pricey for what they are. The set of 6 comes in at $369.99
For a similar look I would search your scrap-booking aisle at your local craft store and pick up some diecut pages like this:
A set of 4 is only $10.99.
Plus I found 12″ x 12″ black frames for only $8.98
For under $50 you can get a similar look in your home.