Newegg offers the TP-LINK AV Nano Powerline Adapter Starter Kit, model no. TL-PA4010KIT, for $39.99. Coupon code "EMCAPKV58" drops it to $29.99. With free shipping, that's tied with our mention from a month ago and the lowest total price we could find by $7. These adapters allow you to create a network using your home's existing electrical wiring and feature speeds up to 500Mbps. Deal ends March 18.