M Records that are deemed to be in mint condition will be those considered perfect and unmarred, more or less coming in a condition that is brand new. The disc itself will be untouched by surface marks, groove wear, ring wear, surface noise, or anything that might otherwise affect the overall sound quality.
Likewise, this quality will also be reflected in the record’s sleeve, which will be entirely unaffected by any light marks or anything that would otherwise eschew the appearance of it being brand new. Many mint condition records, in fact, still come in their original plastic wrapping.