Aston’s Lagonda went full wedge and digital in the late ’70s, pairing a 5.3L V8 with a sci-fi dash. Unreliable and pricey, it still grabbed headlines and buyers—helping keep the company afloat.

Exclusive automobiles like today's Nice Price or No Dice Aston Martin will never be paupers' cars, but some do depreciate into the realm of possibilities for many regular folks. Let's see if this V8 ...