Amazon has a pair of over-ear gaming headphones [amazon.com]
for $16.99 when you apply coupon code GGD8YUOX
at checkout. The code takes $10 (40%) off the price.
- Type: Over-the-ear
- Speaker diameter:40mm
- Impedance: 32 ohm
- Sensitivity: 104dB±3dB
- Frequency Response: 20Hz-20KHz
- Mic Dimension:6.0*5.0mm
- Microphone directivity: Omnidirectional
- Plug:3.5mm plugs for mic and headset/audio
- Cable length: 2.2M
- LED Working Voltage: DC5V±5%
- Working Interface：USB+3.5mm Stereo
If you scroll down on the page, you can see a Special Offers section where the coupon code is listed. They also have a couple other offers with coupon codes where you can get bigger discounts if you pair the deal with other items from the same seller.