I have several (about four dozen) 1/18 and 1/43 scale cars that are still kept in the original boxes. These cars, almost exclusively Ferrari, have never been removed from those boxes and the newer Hot Wheels cars for example, still have the clear plastic bands to keep the doors closed in place. My question is whether it's worthwhile to keep the cars like this. Would the cars be more valuable from a collector perspective were they never to have been opened? Or, is that not a factor worth considering? Thank you for your comments & suggestions.