Newegg via eBay offers the Sennheiser HD 429s Over-Ear Headphones in Black for $34.99 with free shipping. That's $17 under our mention from last fall and the lowest total price we could find by $21. They're compatible with most smartphones and tablets and feature an 18Hz to 20kHz frequency response, 32 Ohms impedance, -39dB sensitivity, and tangle-free cord.