I don't think it's because Elephants are endagered, Frank, but rather that poachers are killing elephants just for the ivory...Much like the practise of killing Kodiak Grizzly bears for their gall bladders...quite reprehensible, in my mind...
Pre-ban ivory is already out there, however, and the damage is already done, so no sense wasting it - as long as it's not NEW ivory, I love it! That pen is gorgeous...looks a lot like the imitation ivory that Ed sells...does it amber over time?