I have a few questions for those who are knowledgeable about the grading process.

Which companies grade crypto-coins? ANACS does and CGS in the UK but who else?

I understand that PCGS and ICG have refused to grade crypto-coins. Did they provide a rationale?

Would people grade coins from, say, Crypto Imperator or Microsoul?

Would you be suspicious if a Casascius coin came up for re-sale and had not been graded?

What difference does the grade make to the re-sale price? For example, what
would a rise from MS-63 to MS-66 achieve? Or from MS-67 to MS-68. Would a
Casascius MS-70 sell for vastly more than an MS-69?

Is it possible to receive an MS-70 grade?

Thanks!

Matthew