Xiaomi Redmi 6

Screen: Scratches that are barely noticeable when the screen is on

Body: Minor signs of wear such as minor scratches and stains, along with possible minor dents/dings, not noticeable from 1 arm distance
*this is a worst case scenario for this grade

Expectation: Expected to have subtle signs of use, barely noticeable during normal use.

Screen: Minor but visible scratches that are barely noticeable if you turn on the screen

Body: Visible scratches, and stains, along with possible visible dents/dings on the body
*this is a worst case scenario for this grade

Expectation: Visible signs of use, fully functional with slight cosmetic imperfections.

Screen: Prominent scratches on the screen. Visibility of the screen is not affected.

Body: Noticeable scratches, visible spots upon close inspection. Possible discoloration, dents and dings on the body.
*this is a worst case scenario for this grade

Expectation: Visibly used but fully functional. Cost-saving despite cosmetic imperfections.