To a classic & vintage road restoration, if the frame isn't worth $ 500-600 like he's asking, nobody buys it. Even for someone after a SS/FG bike it's more than likely not worth his asking price ?
http://bikebuilds.blogspot.com/
To be honest, it would have to be original and excellent condition for me to consider it for a road bike. I'm on record as indicating that's what mine is worth to me, but everything is original virtually showroom condition, I doubt anyone gives me that, but that's what I'd need to replace it with. As a SS/FG, there are probably several $ 500-600 SS/FG's available that I'd prefer. Schwinn Madison, Fuji just to name a couple.