Rimowa's pre-owned suitcases look well-worn. And many consumers see these dents and scratches as a badge of honor.

Unlike most backpacks or duffels, the best rolling luggage ... wheels on it,” he says. “Those wheels are encased, so the only thing that can really happen on those wheels is that they wear ...

Are they just for emergencies, or do they cover regular wear and tear? One woman was very surprised to find out that her “50,000-mile” warranty had been voided due to her daily use.