A toy car in the box is cardboard plus paint. Pressure from above creases the box, a loose car loses its mirror at the first knock. In the overview Security for collectors this sits with LEGO and the Action Figures: the packaging is often the piece.
Storage
Dark, dry, little weight on the cardboard, loose cars so that nothing rubs the paint. A cellar only with clearance from the floor.
When someone comes
A crate is toys, a rare number with a readable name is a target among collectors. It does not sit on the stack by the door. This does not show up in EinbruchsRadar. The list records the expensive numbers with proof, the rest as a crate.
The folder
Maker, number, original packaging or loose, proof for the expensive ones, photo of the box.