If the price was right I'd buy it. I've had one, it was an older model (a 404 D) German Army surplus. Most everything on mine was impossible to get to, tune up items etc. and parts were way expensive.
Any kind of do it yourself major or semi major repair and you had better have a crane. The major components are heavy. I had to take the whole cab off to do anything major on the motor.
On the plus side, they are really impressive. I've driven mine over acres of fallen timber after a tornado came through.
I got to drive a newer model at a local auto show, they had an agility course set up for it. I white knuckled the instructor and was smiling the whole time.