Yay Rarity! And, yeah, she doesn't seem to sell. I remember when my local Target had piles of the basic and fashion style Rarities on clearance because the shelves were clogged. That was before I started collecting, alas, or I would have picked some up. Her FS figure now commands absurd amounts on the secondary market.
I guess this kinda confirms Hasbro's belief that white toys don't sell to girls. (E.g, Pinklestia.)