Hmmmm, hard to say really. The thing is, the B-1 was quite a popular and much loved watch when it was a current model, and it's replacement (the Airwolf, which looked quite a bit different) wasn't hugely loved from the outset, so demand for the B-1 stayed high.
The M1 was never the most popular piece for one reason or another when it was a current mode. Additionally the Seawolf Chrono that replaced it is practically identical to the M1 (apart from being made of SS) so I'd suggest there's unlikely to be a mad rush for M1 going forward.
Obviously I'm bound to be proved entirely wrong here!
