Amazon offers its Prime members the TP-LINK AV Nano Powerline Adapter Starter Kit, model no. TL-PA4010KIT, for $29.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.58.) That's tied with our mention from last week as the lowest total price we could find by $10. These adapters allow you to create a network using your home's existing electrical wiring and feature speeds up to 500Mbps.