These have 3-5 hours use total, purchased about two months ago. They've been languishing since the 009's came in and my listening room needs less clutter. As new, taking into account that the E-90 box never comes in 10/10 condition new from Koss anyways.
Price includes shipping in CONUS but not 3% paypal.
Koss is the lands end of headphone companies when it comes to warranty service.