What is the signature car that comes out of the Big 3? The head turning car that everyone wants to own. The one that hardly ever brakes down, gets great gas mileage and is luxurious. The one that is so great you don't ever want to part with it, but the resale value would make you want to update to a brand new shiny one.
Figure that out and tack on $800.00 cause at that point the "Lets get it " will far outweigh the "but it's $800.00 more than that other one".