Grading lures is not an easy task. There is no hard and fast rules. My “mint” condition can be signifantly differenct from other people. Its all boils down to our own experience and knowledge.
To help us out NFLCC developed a lure grading system. You can add + or – to the regular grading system. This will give a wider range on grading.

• 10 New In Box NIB Unused with original box or carton
  9 Mint M Unused without box or carton
  8 Excellent EXC Very little age or no paint cracks, very minor defects
  7 Very Good VG Little paint cracks, some minor defects
  5-6 Good G Some paint cracks, starting to chip, small defects
  3-4 Average AVG Some paint loss and/or chipping; showing age.
  2 Fair F Major paint loss and/or defects; much chipping
  1 Poor P Parts missing, poor color and/or major chipping
  0 Repaint R Original paint covered over in part or all.