Newegg offers the refurbished Sony XB Extra Bass Headphones, model no. MDR-XB600, for $37.99 with free shipping. That's the lowest total price we could find for a refurb by $15. Features include 40mm drivers, 4Hz to 24kHz frequency response, folding design, foam ear pads, and tangle-free cord. Deal ends May 24.

A 30-day warranty applies, but it's unclear who backs it.