Amazon offers the Magellan Roadmate 2045T-LM 4.3" Touchscreen Portable GPS Navigation System, model no. RM2045SGLUC, for $79.99 with free shipping. That's tied with our mention from five weeks ago and the least expensive touchscreen GPS systems with both lifetime maps and traffic. (It's a current price low by $61.) This GPS unit features a 4.3" 480x272 wide touchscreen LCD, traffic receiver with free lifetime traffic updates, free lifetime map updates, text-to-speech with spoken street names, Highway Lane Assist, OneTouch favorites, highway exit POI search, AAA TourBook, preloaded maps of the United States, Canada, and Puerto Rico, and more.