Sonic Electronix via eBay offers the Polk Audio Hinge On-Ear Headphones in Black/Silver, model no. AM4119-A, for $39.99 with free shipping. That's $3 under our November mention and tied as the lowest total price we've seen. (It's the best deal currently by $5.) Features include pivoting ear cups, in-line 3-button control, and detachable single cable. Deal ends today.