That sounds like a good price here.I have talked hime down to 11,500.
Don't forget about charges like title transfer, tags, etc. Even though it's a used bike, the title transfer alone would include an extra $748 in tax here in MN. Sales tax is set at 6.5% EVERY TIME the bike changes owners, for the life of the frame. I've never understood why this applied only to motorcycles. On cars it disappears after they're 10 years old.