I've never seen a Crocker speedway bike. Look how the front sprocket is mounted, with the driveshaft coming out of the frame. And that pie-crust Avon Dirt Track.
I hope someone with the attitude of the Blast from the Past guys (who actually race bikes of this vintage) buy it, but I doubt it. Some rich collector who hasn't ridden a bike in 30 years will probably snaffle it and think he's doing the world a favour by saving it. G