I think this one is a good example of a model car that "should" be included/kept.

http://www.imcdb.org/vehicle_85402-Chevrolet-Camaro.html

It's been awhile since I've seen "Tommy Boy", so I'm not sure how those models are used. I know when I was doing "Ghost Whisperer" there was a scene where a boy has a bunch of remote control trucks, one he controlled as a ghost...i thought about including, but didn't. so i'm 50/50 on it...but kinda like my thoughts on background cards...if it looks like the car, and can be identified easily, then I say "yes".