A | :New, Never open, Never used. |
AB | :Like new, just sign of wear. |
B | :Few sign of use by terms, or good used condition. |
BC | :Many sign of use, few small scratches or dents. |
C | :Heavy useed, noticeable scratches or dents. |
D | :Defective, missing parts, for study. |
Grading of condition is to represent the appearance. Other necessary things are describe.