I stopped at a Pilot the other day and noticed that they drastically cut the price on the TND 500. It was priced at $399.99. I guess they're not selling all that great.
Edit: just looked on the Rand-McNally site - the price is the same there as well - $399.99.
http://store.randmcnally.com/product...ute+tnd+500.do
To be honest, I'd love to see them with a software version of this that will run on laptops.