The seller lists six different "slabbed" chips being offered in five different numerical grades ... some separated by as little as one single point.

VF60; VF65; CS91; CS92; CS95(2)

No where does the seller mention the independent 3rd party grading firm that has assigned these arbitrary grades. Who uses these grades on chips?

I challenge anyone to describe the differences between CS91; CS92, CS95 and the difference between VF 60; VF65.