Originally Posted by frost

Some of the cars are 3 years old now, it's about time people start trading them in newer things.

Also, I've noticed a lot of the comments in the for sale threads point out that they are correcting financial mistakes they made. So it looks like many people bought more car than they could afford, maybe thinking they would eventually get a raise, promotion, or better job, and are correcting that miscalculation.

Originally Posted by edconline

Another reason it may seem this way to you is, you are on an enthusiast forum, yes a 370Z one, but an auto enthusiast forum nonetheless. The type of people that visit these forums are more likely to want to upgrade, start a new project, or just get a shiny new toy than people that just bought the Z, kept it stock and don't really think about mods or visit the forums.

I think you could reasonably conclude that the ratio of Z owners on the forum trading/selling their Z's for something else is higher than that of the Z owners that are not enthusiasts or active on the forum.

Finally, as an active member yourself, you are going to notice all the posts about people who are selling/trading (other active members who are excited to talk about their new purchase or attempt to part out/sell their car here). Probably the same type of thing happening on most other forums for different car makes/models. I would be very surprised if this were a 370Z only thing.