AUBURN, Indiana — In the rarefied upper echelons of automotive collecting, provenance, rarity, and raw theatricality dictate value. At a landmark sale hosted by Kruse Auctions in Auburn, Indiana, those forces converged on a single, astonishing lot. A one-off, gold-plated 1953 Cadillac Elegante hammered down for a staggering $1,275,000, setting…