"When the dust settles and people calm down, a lot of these guns will be hitting the used market at bargain prices. That'll be the time to buy."
You're dreaming. Have you seen any locked versions of the 642 at bargain prices ? I sure haven't. So, why would a more desirable version of the same gun start showing up at bargain prices, especially since there was only a run of 4,000 ?
It's S&W's most popular gun. There will always be a market, particularly for the no-lock version.
Before these came out, the 642-1 was bringing $100 - $250 more than the locked version on Gunbroker.
So, I'm betting when these are gone, all you are going to see is them commanding a higher price on Gunbroker. There won't be any bargains.