What you describe is precsely why my LP buying has dropped off significantly in favor of CDs.
I haven't found a reliable solution other than to buy from sellers whose gradings I trust (based on good past experience), and personally inspecting LPs before I buy.
I have found most audiophile CDs (JVC variants, XRCD, etc) of older LPs sound as good if not better than the vinyl when all things are considered. I'm listening to an outstanding 20bit JVC X2 version of Gene Ammons' "Boss Tenor". The CD cost slightly less than a near mint (maybe...maybe not...) LP version found on E-Bay.
I haven't found a reliable solution other than to buy from sellers whose gradings I trust (based on good past experience), and personally inspecting LPs before I buy.
I have found most audiophile CDs (JVC variants, XRCD, etc) of older LPs sound as good if not better than the vinyl when all things are considered. I'm listening to an outstanding 20bit JVC X2 version of Gene Ammons' "Boss Tenor". The CD cost slightly less than a near mint (maybe...maybe not...) LP version found on E-Bay.

