This dry list was compiled from various posts on rec.games.frp.dnd.
Rewards to give characters besides experience and gold: These are good because they can add to the interest of the game, and can all cause as much harm as good.
paintings, sculpture, music boxes, clocks, ancient tomb transcribed with a famous but lost speech, books (poetry, philosophy, science, lore), combs, buckles, buttons (now known as cuff-links), clips, broaches, bangles, beads, jewelry, gold chains (sometimes hundreds of yards transported to a jeweler), fur cloaks, fine leather and wood saddles with silver or gold inlay and carvings, barding
Cylinder: pinned cylinder plucks the tune from a comb of tuned steel teeth.
Disc: tags of metal from perforated disk used to pluck a tune from a comb of steel teeth using asterisk-shaped “star wheels.” It's easier to change a disk than a cylinder, so these replaced cylinders quickly. Made in elaborate cases with lots of inlay and intaglio, fancy carvings, etc.