It would be awesome if Jolla would become a successful company after Nokia sold out to MS (because it seems like Jolla is a continuation of what would have been Nokias route without MS). Also i only heard good things about the N900, i love linux, i hope the handset/os is "free"... and 399€ doesn't seem to be too expensive.
Also it looks well designed.
I think 400 euro is a lot for a device with these specs though. They are letting a huge number of devices "fly under them"(be cheaper) and the average consumer doesn't give a damn if the phone runs Sailfish OS or Android.
Good luck, Jolla Team!