TigerDirect offers the TRENDnet Powerline AV Ethernet Adapter Kit, model no. TPL-303E2K, for $59.99. This $20 mail-in rebate cuts it to $39.99. With $2.99 for shipping, that's the lowest total price we could find by $16, although we saw it at this price with no rebate necessary two weeks ago (since expired). This plug-and-play Ethernet kit uses your existing electrical outlets to create a secure high speed building-wide network. Deal ends March 31.