$100 seems high to me unless it is in perfect cosmetic condition.
I converted one of my bentwood case machines to a hand crank, and the case does not fit over the hand crank. Can't be sure offhand if it was a 99K, but I think it was.
Be careful with the carrying case. I always support mine with a hand underneath, as I once had a machine fall out of the case. The handles can break from the weight too. So, always provide support.