I got my passport 8500 from ebay.... brand new it was sealed..

and even got the warranty.... it was about $210?? including shipping...

I even made the cord with phone line... so..

i could hide the wires and mount it right below the top tinted part of windsield...

it's not quite noticeable from outside even to a person standing right next to ur driver side talking through the window or something...

unless u look for it...

and it definitely has the clear view of front and back.... nice...

anyway thats just me....

i think passport 8500 is a portable kind and valentine is like ur audio set...

that you gotta screw things in and mount the sensors around ur car...