Yes, because you can get them extremely cheap now. They are great value for money, well maybe not great but worth the price.

No, because you will get much more value for your money by getting a Galaxy Nexus, they are almost as cheap as the N9 now. That may not even be an option for you, but it should IMO.

The N9 is also officially discontinued in most markets they were sold in, so you have to decide fast, they will soon disappear. It's like Nokia cant wait to remove every trace of the Maemo/MeeGo adventure.