If you love this car, you will drive it. But higher mileage works against price appreciation. Mountains of money are not required. Take a vehicle's enthusiast infrastructure into account. Lots of clubs and events will increase the initial purchase price, but provide ready markets and uses for your car, and insulation against the ups and downs of the market.
Speed is an aphrodisiac.
Okay, score one more for the 124S Spider, for a tepid four overall. Spider has the potential to hold its value, but there are factors working against it. These cars are worth more as drivers than as rolling art.