Monster Products via eBay offers its refurbished Monster Diamond Tears Edge On-Ear Headphones in Black, model no. 128295-00, for $149.93 with free shipping. That's tied with last month's mention and $57 under the lowest total price we could find for a new pair. They feature ControlTalk, folding ear cups, and a case.
newegg offers the refurbished Logitech G35 7.1-Channel Surround Sound Gaming Headset, model no. 981-000116, for $45.99 with free shipping. That's $24 under last month's mention of a new one (which was bundled with in-game items for Dungeons and Dragons: Neverwinter) and the best price we've seen for these headphones. (It's a current low for a refurb by $20.) This 7.1-channel surround headset features USB, on-ear audio controls, two swappable headband pads, and an adjustable noise-canceling microphone.
A 90-day warranty applies, although it's not clear who backs it.