"Those derailleurs may even be pre-1986 non-SIS versions, in which case the STI won't work." Wow, good call. I don't know too much about vintage components but this seems to fit in with why he's selling it. He was *****in because the LBS charged him $90 to install the new handlebar and brifters. He probably realized that this was going to cost him a lot of money to get new parts on this because he would have to upgrade almost everything, not just the brifters and some odds and ends.
I'm sorry about the pic, I emailed him asking for better ones. From what I can remember, the black paint seemed original. Also, the 42 was stamped on the small chainring if that is of any help and the headset was 600 too.