I got this one just recently for $50. It says it has lifetime maps but I'm still working that out with the map maker. Also, it'll probably depend on how long the company stays in business.
But it's OK now...you can set it up as a truck, car, or BUS. Which I did. And the route it took me on from Gila Bend, AZ to Beatty, NV worked flawlessly. Not a single misroute. It also has Canada and Mexico which were a requirement for me. Some of the US brands don't (cough, Good Sam Rand McNally unit, cough).
For $50, with a 7" screen, all the normal dodas people like makes it workable for me...well anyway, here's the link, you can check it out yourself...
GPSSo far, the large screen and the features makes it a winner for me. At that price.