Ah, the Depreciation Special, that magical situation where the wealth of the 1% descends upon muggles in a torrent instead of a trickle. But the shiny low market price often distracts from future costs such as fuel, maintenance, tires, and first-generation infotainment systems. Many obvious depreciation specials exist, such as the Maserati Quattroporte, Volkswagen Phaeton, and this 2008 Cadillac STS; a V8, RWD monument to the traditional American sedan for only $13,500. But which depreciation special is the best?