Royalty Exchange is not, as it might sound, the place you go to trade in a late-model Charles for a zippier Price Harry. It's where you go to buy the future earnings of Usher, TLC, Boyz II Men and other recording artists--including ones deceased (Judy Garland, e.g.).It's an online auction house where what's being auctioned are future royalties from songs. Creator and president Sean Peace tells ABC News he originally intended (and still does) for the site to auction royalties from many different kinds of intellectual property--movies, works of literature, pharmaceuticals, patents. For now, however, its' offerings are limited to royalties from songs and from an as-yet-unbuilt solar energy plant in Ontario, Canada.