The way I always looked at it is if I bought a new sports car every two years, I would lose just as much with the initial depreciation as I have invested in mine through the years. I also think my Z gets more attention as the years go on (partly due to the condition mine is in but also because people are just not used to seeing them as often these days). I get more compliments than if I was driving a brand new sports car which is why I still like owning it.