That's a very nice bike! Looks factory new! Too bad for the original owner that he didn't ride it more often, but good for you.
My husband and I just picked up a 1985 720 this weekend. Serial number indicates it was made in 8/84. It has blue Blackburn rack and front lowrider, plus the water bottle cages. The Brooks saddle was no longer on the bike (stock in 1984 and 85). We took it to our local retrogrouch bike shop to have it tuned up. Michael picks it up this afternoon, and will then proceed to ride the heck out of it! This bike handles like a dream, and the barend shifters are great.
Now I want one in *my* size.