Stephen;
I will say that I believe W&W exported the vast majority of their hand machines. Probably one could have been ordered here in the US but few seem to have been so done. Most of the W&W hand machines available in the US today seem to be "Bring Backs" primarily from the UK. They thus seem to always ask a Premium for them here.
As I recall I had to give US $101.00 for my D-9 hand & US $150.00 for the #9. Neither had accesories but both did have the cases with covers. I have yet to find a #8 which I am able to afford.
I do live in a sector of the US where Hand Crank machines seem to be virtually unknown except to the few collectors around. Most other people seem to not be aware of their existence. Their Ancestors all used Treadles. Older treadles, especially Singers are in an abundance & can often be picked up rather inexpensively, but not so the hand machines.
There may be other areas of the country where the hand machines were more widely used but I don't believe the W&W's were common anywhere in this country. There were probably quite a few sent North to Canada & some of these may have migrated back South but they are just not in abundance here.
Miller