There is one on Phx Craigs List for $600. Looks nice. http://phoenix.craigslist.org/evl/msg/2999282163.html
I kinda hated to sell my Sunn Coliseum-300. Fantastic amp, very versatile and would go down to 2 ohms.But it was heavy and big. That delightfully light Genz-Benz Shuttle 6.0 stole me away and I knew I wasn't going to use the Sunn any longer.