Beautiful bike. I'd say that a repaint which would do this frame justice would run somewhere north of $1000 with masked and lined lugs, masked dropouts, box pin-striping, restored decals etc. I think anything less would lower the value. I'm not allowed to post links yet, so paste this into google for a good series of articles on the topic from My Ten Speeds [should i paint my bike site:
www.mytenspeeds.com]