For its newsletter subscribers only, newegg offers the TP-LINK AV Nano Powerline Adapter Starter Kit, model no. TL-PA2010KIT, for $44.99. Coupon code "EMCXTWS46" cuts it to $29.99. With free shipping, that's the lowest total price we could find by $15. These adapters allow you to create a network using your home's existing electrical wiring and feature speeds of up to 200Mbps. Coupon ends March 20.