it also depends on what grading structure the people use
i only use the one from record collector magazine , everyone has different ideas on what is vg g ex mint etc and people put alot of +s infront etc
one mans ex record is anothers vg
were they graded on apperance , sight , playable etc
the best way is to try and go through paypal as goods not how they were meant to be , but if other people who bought similar lots said they were happy then you may have a job prooving it