Shop Divvy via eBay offers the JBL Synchros S500 Powered Over-Ear Headphones, model no. SYNAE500STL, in Slate for $69.99 with free shipping. That's the lowest total price we could find by $107, although most retailers charge around $280. They're powered by two AAA batteries (included) and feature an inline 3-button remote, microphone, carrying case, 50mm drivers, and steel headband.