Think seriously before you pass.
Advantage - The bike is a 63 - bigger frames don't draw the same demand, so the guy won't be getting a lot of calls.
Disadvantage - There aren't a lot of options for you because of your size.
Offer the guy $750 or $800 with shipping included and see what happens. You might have to wait a few days or forever, but you might get the bike you want at a good price.
55/Rad