Now that these are all pretty much 20 years old or more, the value on the used market is going to vary greatly-a low mileage in pristine condition would probably be more valuable with an air ride, one with higher mileage would not be as easy to sell unless it had springs-if you are going to use this car as a daily driver or even as a second car, I'd be more interested in it if it had springs, it would be more dependable. An air ride car that sits in the garage is still going to have issues over years of sitting I would think, air ride is really nice when it works and the car is pretty much a flowerpot if it is broken. My 96 has 132,000 miles and is very clean and pretty much defect-free, it is not used as a daily driver or even a second car anymore, hasn't been for at least 8-9 years. I've only put about 100 miles on it since the last inspection in March, but I did drive it this weekend and put about 70 worry free miles on it yesterday, with my fail-proof Strutmaster springs. I was a purist on this subject before I had issues with the two Marks I've owned over the past 16 years, I did the springs on this one about 2 years ago and really prefer it this way now, I don't have to concern myself with a system that could fail at any time (my first one did just that 125 miles from home, that was a bad return trip).