Be sure to check out my dozens of other 1/18 scale cars from this series and lots of other brands as well.  Most are boxed but some are loose like these.  The loose ones were stored carefully.  
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A note on packing - Loose 1/18 cars I send packed in styrofoam peanuts - wrapping them can scratch them or crush small trim pieces so I am one to use the packing peanut method.  
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I acquired a large collection of diecast including these 1/18 cars from an older gentleman.  For the most part, he did not remove them from the boxes for display, most are still sealed.  Many of the boxes are totally perfect a few have some storage / shelf wear.  He didn't display them at all no dust no fade he just bought them and put them away in totes. 
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You can combine shipping and save a ton as well so be sure to check them all our they are almost all in as-new boxed condition!