After reading this post last night,(Saturday night) I was shopping at a Sports Authority,(next to a Best Buy) and "for the hell of it" ran into the Best Buy to check the price on a 550 Zumo...
$449.99 on clearance!!!
They were out,but the kid looked in the store computers stock for other locations,He found Us one.
We drove VERY quickly there,and they did not want to honor the price,saying that the first location was clearing them out,and The store We ran to was not.
After a word with the manager,He sold it to Me for the WONDERFUL $449.99 price!!!
It's installed already,and awiting its first duty,guiding Us thru Colorado for 10 days!!