While the pigs and bears are the most mass produced the devil still gets his due. Devil Fairings are quite collectible and come in either a whimsical, cherubic look or the traditional, somewhat evil look. There are several styles of devils available and all are fairly rare. If you find a cherubic devil on a wishing well with a pig in it - snatch it up. I've never seen one come up for sale although I've seen it in my reference book listed below. Be ready to pay a large price for it I'm sure. There is one figurine with a devil on a submarine that has Japan written on the side. It sold upward of $800. I've only seen 2 of those on ebay.
Some devil fairings are featured in a book called "This little Piggy" which is still available at Amazon.com. Although pricing is from 1992 it is still an excellent reference.
Here are some interesting links to other types of fairings: