Open-box Blue Microphones ELLA planar-magnetic drop to $550

The last time we posted about the Blue Microphones ELLA planar-magnetic and powered headphones they were going for $590 in open-box condition, but now they have dripped further down, going for $550 with free shipping in open-box condition by authorized dealer OneCall directly or through Amazon Warehouse Deals. Per the listing, they come with a full warranty.