How hard were they to come across? As far as I know,none of my lfs's sell them, and out of all the websites that sell fish, only one carries them. Thankfully the one site that does have them doesn't overcharge.
Honestly i just got super lucky as they do seem to be quite rare in the trade, guessing coz they are a some what newer species discovered in the last few years???
However, there is one LFS here where the owner is a big fan of rare gobies etc, so whenever they pop up on his import list, he tends to try bringing a few in...