I've been getting in touch with my Norse heritage lately, and the seax was kind of the standard "sidearm" in the viking age, and I remember thinking just a couple days ago "Man, I hope Yangdu gets a shipment of those in again." Next day, BANG! It's a DOTD, and I was shocked at how late I saw it and no one sharked it! It was meant to be!!
FWIW, I think on non-standard items like this (and maybe standard items) Yangdu usually gets a few in at a time, so if you email her, she may have more. She doesn't post her whole inventory on DOTDs.