For its newsletter subscribers only, newegg offers the TRENDnet 200Mbps Powerline AV Ethernet Adapter Kit, model no. TPL-308E2K, for $39.99. Coupon code "EMCXSXS68" drops it to $29.99 with free shipping. That's the lowest total price we could find by $11. This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 200Mbps high-speed building-wide network. Deal ends April 10.