Yes. Getting a "refurbished" unit as a replacement is one thing, getting a unit with fingerprints and splash marks on the screen (as if it came right off the sales floor) is something completely different.

Refurbished means cleaned, inspected (and faulty parts replaced), and given a new serial number - yes, it will be a "special" refurbished serial #. Taking a dirty unit off the sales floor is not a refurbished unit.