Instructions
If you have the model's original package, be wary of dirt, lint, moisture and sunlight. They should be placed in display cases or storage boxes, otherwise dusted regularly with a dry cloth.
Old cars saved from childhood can still be valuable, even if not in pristine condition. You can perform minor touch-ups and store them in display cases.
Get information about the rarity of certain models you might have. Check specialty catalogues, collector's magazines and websites about rare cars, values and replacement parts.