They aren't necessarily "hard to find" I suppose but for the reasons you mention. Essentially it's hard enough to find them in the coloured versions let alone the orientation type. Much appreciated Lewy! I can see a light at the end of the toonie tunnel.
Sure! Yes it's designated by edge letter orientation. So type A is read upright with the obverse showing or on top. Type B is read upright when the reverse is on top!
I personally buy a lot on social media auctions. Reputation goes a long way there and there is no commission or fees involved so sellers are able to capitalize on the true value of their coins.