As one of its daily deals, B&H Photo Video offers the Polsen HPC-A30 Closed-Back Studio Monitor Headphones in Black for $14.99 with free shipping. That's the lowest price we could find by $15. They feature 50mm drivers, 18Hz to 22kHz frequency response, and a 1/4" adapter. Deal ends today.
These lucrative gigs let you work in your slippers.