For its newsletter subscribers only, newegg offers the TRENDnet 500Mbps Powerline AV Ethernet Adapter Kit, model no. TPL-406E2K, for $49.99. Coupon code "EMCXMXW74" cuts it to $37.99. With free shipping, that's $2 under our mention from last month and the best price we've seen for this kit. (It's also a current price low by $9.) This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure 500Mbps high-speed building-wide network. Coupon expires August 7.