Are diecast cars without the box worth less?

Answer 1

Yes. When you have them in the box it means it has never been opened and people take interest in knowing that.

"Packaging is extremely important when it comes to collectibles. In some cases there are Hot Wheels "Collector Number" packages that go for as much as $3500. It's the package that demands the value and not the car that is in the package. The car comes in many other packages and sets, but in this case, it's the "Collector Number" on that package that is rare in supply and high in demand."