The S&W Model D Rifle was made by Husqvarna and they have a good reputation for being a good solid rifle. To me it depends on what shape the rifle is in and how is the bore. I doubt that with it being a 30-06 that it's been shot so much that it would have any kind of problems. That said make sure the bore is not pitted from not being cleaned often enough.
That is a fair price if the rifle is in excellent shape but too high if the stock is beat up and it looks like it was used and abused.