The Retail price for the Honda/Acura White Navigation 2011 map update disk version v4.92 is $185 + tax + shipping. The Orange Navigation Disk version 3.A0 also has the same retail price.
The same disks are available for only $99 till January 31, 2011.
If you need the "White Disk" then go here:
If you need the "Orange Disk" then go here: