Lovely bike.
I'd say she is pretty collectible and a worthy keeper. Good, early Dura Ace gruppo, Columbus tubing, and in decent condition for her age all make for a nice bike that vintage guys would love to have.
But good grief man, show her some love, clean her up, especially that chain! I'd take her in for a good servicing from your LBS. If it makes you smile riding her like that, wait until you ride her after a good servicing!
