NeweggFlash offers the Rosewill Powerline AV Mini Wall-Plug Adapter Kit (pictured), model no. RPLC-201KIT, for $19.99 with free shipping. That's the lowest total price we could find by $30 and the lowest total price we've seen without rebate hassles. This kit includes two adapters that allow you to create a network using your home's existing electrical wiring, with data transfer rates of up to 200Mbps.

Also available is the Rosewill Powerline AV Pass-Through Adapter Kit, model no. RPLC-201PKIT, for $22.99 with free shipping. That's the lowest total price we could find by $12. Like the above, this kit includes two adapters that allow you to create a network using your home's existing electrical wiring, with data transfer rates of up to 200Mbps. Each features an AC pass-through so you can continue to use your electrical outlet. Both deals end July 30.