I would leave it as is. If someone's going to buy it, they probably have a preference as to the finish anyway and can do it themselves. Plus, in my mind, the presence of the decals and everything makes the bike a little more "authentic." Any buyer with eyes can tell it's an old classic. With refinishes, it's a different matter. My eye passes those buy as just another decent frame.

Plus, you never know, someone may just like it the way it is.