Maybe there is room to negotiate. I know I may have scored the deal of a century when I found mine on CL, but given the cost of a new one when they ceased production, and the fact they are no longer being made, $1000 doesn't seem like a bad price. If he thinks it is too much I'd say he's in for a loooooong wait because there just aren't that many out there to begin with and wanting to find one at a rock bottom price will prove elusive.
Eric