BuyDig via eBay offers the Klipsch X4i In-Ear Headphones, model no. 1015882, for $49.99 with free shipping. That's $10 under our March mention, the best now by $9, and the lowest total price we've seen. They feature balanced armature drivers, a frequency response range of 10Hz to 16kHz, and in-line music and voice controls compatible with select Apple products.