Sonic Electronix via eBay offers the Limitless Creations Audiophile On-Ear Pro Studio Monitor Headphones, model no. HP3BK, for $19.99 with free shipping. That's $110 off list and the lowest total price we could find by $5. These closed-back headphones feature 45mm drivers, a frequency response of 10Hz to 26kHz, and come with a 1/4" adapter. Deal ends today.