For MEElectronic headphones:
A buy one, get one free promotion on all M-series earphones! Just add two of any of the M-series models to your cart and enter coupon code "M_2FOR1" at checkout. Orders over $25 are eligible for a shipping discount with "SHIPPING_COUPON". P-versions are eligible as well!
On their site :
http://www.meelec.com/