I agree about the value of a stone being a factor. I have some VVS longido rubies and some eye clean no oil emeralds. Those are the only stones I’d consider a GIA report for if I was going to sell them. It isn’t worth it to try to sell a $200 stone with a GIA report when the report costs $70-$85. It eats too much into profits. I don’t sell my stones, but if I did the aforementioned would be my business decision.