Got these on Sylph this weekend. Only 3 other pairs in history in jeuno (not even listed in the other towns). 3 prev had gone for 300K, got mine for 100K so not too bad I hope. Will last me until the AF.
Probably because they are the HQ of a level 89 synth that is very rarely synthed anyway. More than likely, no one has ever bothered to make them and put them on sale on the AH.