Love how far we've come since 2006!
For certain types, there are many which are incredbily hard to find. Specimens from Lake Turkana are extremely hard to source, it has gotten easier in recent years for P. senegalus, but P. bichir from Lake Turkana still seem to sell for among the highest price of any bichir, over $3,000 USD is not unheard of.
The relict, dwarfed P. senegalus from the Sahara desert are endemic to one oasis, and are probably the rarest known bichir, they've not yet made it into the trade (and may never).
The Giselas Bichir (likely a type of P. congicus or new species of close relation) has recently made it into the trade in larger numbers.
The holotype of P. bichir from Egypt, collected during Napoleon's conquest of Egypt may now be a 'functionally extinct' (if so, it's the rarest) or extinct type of P. bichir, as this species has not been sighted in Egypt for a long time. It's thought that bichirs are no longer found this far north (thanks to growing desertification brought on by anthropomorphic climate change and urban encroachment), with the exception to those P. senegalus isolated in an oasis in the Sahara desert.
As for species, I don't think this has changed much, at least not for their wild counterparts. P. ansorgii and P. teugelsi are still the rarest species for many if you source wild only. They're in abundance if you go captive bred, however.
