Répétition d’un Ballet, the famous painting by French artist Edgar Degas, sold for $401,000 in 1965. The jubilant seller bragged that Degas originally asked a mere $100 for the painting. In his early career, celebrated American artist Norman Rockwell sold original works like Homecoming Marine and Breaking Home Ties for a few hundred dollars each. In the last decade, these paintings were resold for $9.2 million and $15.4 million at Sotheby’s auctions, but the Rockwell estate received nothing in these transactions. Over the centuries, great wealth in the arts has rarely translated into great wealth for the artist. Since its inception in France, the resale royalty known as the droit de suite has aimed at remedying this perceived injustice. A...