Tervlon gave me a shout to let me know that Target is starting to put out their Valentines Day seasonal items and Series 3 Collectible Minifigures seem to be part of the planogram.
I don't know which specific Target store this corresponds to, but according to Flickr master Tervlon is in Virginia (US). It would also seem that the days of $1.99 Collectible Minifigures in the US are over.
You can see more on Tervlon's Flickr stream.