TheGoodBlokes via eBay offers the Koss Pro4AAA Titanium Stereo Headphones, model no. Pro4AAAT, for $44.99 with free shipping. That's the lowest total price we could find by $15. These over-ear headphones feature oxygen-free copper voice coils, titanium-coated diaphragms, an 8-foot cable, folding design, steel headband, 250-ohm impedence, and 10hz to 25kHz frequency response range.