Never been used, but cannot be sold as new. Why? It’s no longer in retail packaging and / or is a customer return. Complete with warranty. May not include the headcover, adjustment wrench or other accessories.
Refurbished by the manufacturer to their original specifications and is in full working order. May have some slight cosmetic flaws and be in a generic package.
Almost indistinguishable from new. A few slight scratches which are not visible at setup.
Very minor cosmetic flaws from infrequent play.
Minor cosmetic flaws from frequent play. Flaws are not visible at setup - many years of play left.
Noticeable cosmetic flaws from multiple years of play - performance is not compromised.
Significant cosmetic imperfections which are obvious at setup - performance is not compromised