In plain English
Cosmetic damage is the whole business model: the unit works, the finish does not sell at full price, and the discount is the margin.
Grading matters. Be consistent about what counts as light, moderate or heavy damage, and photograph every unit the same way.
Example
A dented-side refrigerator with a full warranty retails 35% below new and sells in a week.
Why it matters
Consistent grading is what lets you price quickly and handle returns without arguments.
COMMON MISTAKEMixing functional faults into a cosmetic grade. That is how a reputation gets damaged.