Why are the last 9-5's holding their money so well?

[highway]

I'm enjoying my 09 9-5 turbo edition saloon. As much for the fact it was so cheap and still with joy 17k on it. It does wallow a bit in the bends but for the money, condition and spec it was a monster bargain. So much so that I've toyed with changing it for the new 9-5'which seemed to be in production for a short period (how long?) and to my eyes was a very good looking car.

With low miles these still seem far more expensive than I would have thought. Why is this? They weren't well reviewed at the time. Anyone got one? Were there any turbo petrols.? Can you get parts?