"A chip which grades MS99 would look absolutely perfect.'
Yes, when a dealer is selling!

"There's no way anyone could mistake it for an AU80 unless he was "blind"!
My point exactly! Especially when he is buying it.

"Also, who said anything about certificates?"
Where else do you think grading is going?
Slabbing is next.
Re-slabbing is next.
Professional graders is next. I can see the advertisments now.

CHIP SLABBING - $20* UP
*(Depending on how high you want the grade to be)