AltaTac via eBay offers the Pioneer Foldable On-Ear Headphones, model no. SE-MJ591, for $87.99 with free shipping. That's $31 under our April mention and the lowest total price we've seen for these headphones. (It's a current price low by $41.) These foldable headphones feature 40mm drivers, aluminum diaphragms, single-sided detachable cord, and more.