It's not price fixing. a retailer technically can sell a new Leica product for anything it wants, but under the current agreements Leica USA is under no obligation to continue to supply the retailer with new products. In this regard, I'm told that Leica/Leica USA are following the strategy of some other product -- so it's been done before.
And if doubt the varacity of these observations, just check some of the internet sites for Leica retailers. They are listing MSP as the price, and they are not saying "call me" for a lower price.
No doubt, this will force most folks to opt for used or grey market.
Still can't fathom a reason behind this move.