The PC4-7 and SP6-7 are starting to appear in multiple stores as a pre-order option at least in the USA. Sweetwater, Kraft, Musician’s Friends, B&H and similar. For what I can see, it seems that the prices would be around $1,199 for the SP6-7 and $1,799 for the PC4-7, which is amazing considering that they have the same features as their bigger 88-keys brothers. I don’t know when the units will be actually shipping but, if you are looking for one of those, at least you can make your plans considering the prices and pre-order them if they fit your needs.
I don’t know about other countries as each distributor works independently but probably their timing wouldn’t be too off the USA’s one.
Also, check out all the details of these 2 new models at: