Bottomline, yes it is frustrating that the auction companies all do their descriptions different with some describing the bore and other not even mentioning it, however they are not going to change anytime in the near future. In fact all the online buyers could boycott the services and it would still take more years to change then many of us on this website have left.
I think what Vall said pretty much describes the root cause of why the auction houses do or do not describe the bore. REMEMBER WHAT MOM SAID, "BUYER BEWARE"
So, you the potential buyers need to make a decision, are you going to or are you not going to participate, you get to choose.