Consumer groups give high ratings to scratched and dented refrigerators only if the undamaged version of that refrigerator also has a high rating. The scratches and dents should be cosmetic only and cannot affect the operating characteristics.
Consumer Reports has a comprehensive review of refrigerators by style and manufacturer online with no mention of the scratched and dented category, as of 2015.
Buying an unused floor model or one that may have been slightly damaged in transit offers considerable savings. There are many examples of scratched and dented refrigerators where the blemishes are hidden when installed, and so as long as they come with the full manufacturer's warranty, there is little risk involved.