Wow, I have no idea. I haven't purchased a 12x12 collection in a very long time. I usually pick up the smaller pads (6x6 or 6x8) at Tuesday Morning or Peachy Cheap and for the life of me, I can't remember the last collection I purchased.
I bought about ten collections at the Echo Park warehouse sale. They were $4 a piece so whether I needed them or not, too good of a deal to pass up. I got Christmas, Autumn, summer splash, fashionista and winter to name few.