If its exactly the right size and you can see a need to keep it as a spare then keep it. Great bike. I like the way they ride for sure. If not then you may be able to hold out for $300 if its a good market but I'd do a full lube and deep clean and replace cables etc to get top market.
I wrote a little about the Super Sport and had same color combo here:
http://ridesgoneby.blogspot.com/2013...per-sport.html