Apparently no one at American Pawn has heard that the trend in pawnshops is to turn up the lights, fill the floor with tidy shelves, and pipe in Muzak just like at the mall. Still, this downtown St. Paul establishment has a more eclectic selection of merchandise than any of those 1,000-watt joints with the neon signs. In addition to stereo components, TV sets, and interesting jewelry--standard at just about any pawn operation--there are computers, an entire wall of power tools, musical instruments, and not one single copy of the home-video version of The Little Mermaid. On one visit we even scored some scuba gear and a rototiller.