That's a neat one, pheli. I got to see one of these last summer when a member of my local OS brought it to show and tell, and it definitely piqued my interest in section Megaclinium. Megacliniums aren't super hard to find in the US (though purpureorhachis is still one of the rarer ones) but they usually do cost more than other Bulbophyllums! Of course, you probably have easier access to some of the very lovely Taiwanese Cirrhopetaloides that are almost impossible to find here in the US (at least for me so far...).
--Nat