Around here, $6-8K (assuming it isn't a rust bucket). When you say "3-speed" do you mean auto or 3-on-the-tree?
Appears to be a nice rig but the colors on that photo are so oversaturated it looks a bit cartoonish. If that photo were on ebay, I would think the seller is trying to hide something by manipulating it in photoshop.
Check out
http://www.collectorcartraderonline.com/ and compair it to other rigs in approx the same condition.