I have both a 660 and 450 both virtually like new. No scratches or marks and everything (books, etc) included. They have too small of a screen for my old eyes. I just used the 660 for the last 500 miles and it has 2020 maps installed. $250 to the lower 48.
The 450 also has everything with it but I haven't had it hooked up to test lately but will. $175 shipped to the lower 48 by USPS.
Pics on request just PM me.