10/10May have slight insertion marks. Almost indiscernible from a new mouthpiece. Practically out of the box. Like-new!
9/10Few light scuffs and noticeable insertion marks.
8/10Obvious signs of use. May have small scuffs/nicks that do not affect the playing surfaces.
7/10May have very small noticeable nicks on mouthpiece and rim. Obvious signs of use. May have small amount of missing plating on shank.
6/10Definite nicks/dings on playing surface. May have missing plating. Still very playable.
5/10Serviceable but not very pretty. Some shank wear. Missing finish. Scratches and dings on playing service. Still playable.
4/10Still has most of it's finish. More pronounced scuffs and dings present. Extensive shank wear. You can probably still play with this.
3/10Rough finish. Scratches and dings present. Major shank wear. Might actually be playable but we wouldn't recommend it.
2/10Less finish. Heavy scratches and dings. For the most part, unusable and for nostalgic purposes only.
1/10This is a paperweight. Practically no finish. Major scratches and dings on playing surfaces and shank. Unusable. Melt it down and sell it for scrap.

Be sure to check each individual product for more specific details.