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!
“Americans have the right and advantage of being armed. Unlike the people of other countries, whose leaders are afraid to trust them with arms.”
James Madison. Author of the 2nd Amendment