If you look at used car prices and trends, you will see the w124 Cabriolets from 93-95 still going for $25-$35k depending on mileage and condition. They are holding their value significantly due to scarcity and collectibilty. I'm hoping to be able to snag one within a couple years just to park in the garage. R129s do not hold nearly the percentage of value as these cars, I would presume due to the fact they are plentiful and yet more enpensive to maintain than the w124.