Groupon offers the JBL Synchros S500 Powered Over-Ear Headphones, model no. SYNAE500STL, in Slate for $74.99. Coupon code "SALE3" cuts them to $67.49. With free shipping, that's $3 under our mention from last week and the lowest total price we've seen. (It's also a current price low by $13.) They're powered by two AAA batteries (included) and feature an inline 3-button remote, microphone, carrying case, 50mm drivers, and steel headband. Coupon expires April 28.