Ending today, Newegg offers the TP-LINK AV Nano Powerline Adapter Starter Kit, model no. TL-PA4010KIT, for $39.99. Coupon code "EMCANKA58" cuts it to $29.99. With free shipping, that's the lowest total price we could find by $10, although we saw it for $7 less last month. These adapters allow you to create a network using your home's existing electrical wiring and feature speeds up to 500Mbps.