I was thinking the same, but the guy doesn't know anything about the history of the bike.
Somehow I have a feeling this is not a normal 550. The fairing, exhausts, dual disks...
I'm not sure what those exhausts/mufflers are either, i've never seen a pair like those on a cb. They look more like somethin on a two-stroke.
It's not really close enough to drive there, and I have to work the rest of the week. I'll probably have to buy it unseen, or not buy it.