Are you taking the position that N. kaiseri is not endangered? Has the status of the conditions under which smuggling occured "in the past" changed so that smuggling today is not possible?
The converse is also true... when looking at offerings for wild caught animals one has to also consider the captive lifespan of the animals... The fact that they are endagered and that they have been smuggled in the past, doesn't permit us to jump to conclusions without more data. Given the lifespan of this species doesn't mean that at this point we can even be sure that wc animals were smuggled.
This species has also been managed in the pet hobby in Europe for decades.