They're not going to ski as well as a nicely maintained pair of recent model rental fleet skis. But then you probably already know that.
As for nostalgic appeal, the beauty is in the eye of the beholder. I've seen similar go for $500 with the perfect one mount bindings (Spademans). I've seen similar go for $150 with crappy bindings. I wouldn't pay over $100 for anything retro or vintage in ideal condition. But, I wouldn't walk away from something I've always wanted, or used to have and want again just to have it when the price is reasonable.