If it is in good shape and functions properly! Yes it is worth the $400 no doubt. I would suggest shooting it before you buy. I have a 740 and it is a good semi-auto 30-06 rifle. Bought it for $350 with a good scope but it was not a Nikon.
The Constitution is not an instrument for the Government to restrain the people. It is an instrument for the people to restrain the Government!
Today, we need a nation of Minutemen, citizens who are not only prepared to take arms, but citizens who regard the preservation of freedom as the basic purpose of their daily life and who are willing to consciously work and sacrifice for that freedom."
-- John F. Kennedy