2008 Infiniti G Sport 6MT

Please note it's a Canadian car with no accidents and 40 thousand km.

I don't know much about G37's value. So I thought why not have you guys help me out.

I'm stuck between the G above or this one
2008 Infiniti G Sport 6sp

Both manual. The black one claims to have hitech package but doesn't have nav.
none of these cars have nav packages.

 

uhhhh both bout the same price but 30k mileage difference...think about it

 

Well that's just the asking price right?
Some dealers sky rocket the price and then give you a "deal"

My question is, how much should I offer for each car.