Groupon offers the Skullcandy 2XL Ratio Ear Bud Headphones in four colors for $6. With free shipping, that's the lowest total price we could find by $4, although we saw them for a buck less in June (since expired). These headphones feature 15mm drivers and a 20Hz to 20kHz frequency response. Deal ends July 17; this Groupon cannot be redeemed until July 17 and will expire on October 17.

Although this is listed under Groupon Springfield, it can be purchased and redeemed by anyone outside of that area.