Today's deals from DealNN include price cuts on GPS units, headphones and more. At Amazon.com today save big on the Garmin nuvi 1390LMT 4.2-inch GPS. It features City Navigator NT North America maps, free lifetime map and traffic updates and voice prompted turn-by-turn directions, lane assist and eco-rout. This GPS was priced at $229.99, but has been cut by 50% to $114.99 with FREE super saver shipping at Amazon.com.