I don't think I have every looked at the ratings of any of the machines I own or was even thinking of buying. If one comes up for sale that I haven't seen I just look at the pics of it on IPDB . If it looks neat I consider it further and may put the title in the search engine and see what comes up on the forums about it. So I guess that is kinda a ratings system? Maybe?
Probably why all my games are Duds? Ha, just kidding I like my games, just wish I could swing a few Newer titles too add to them.
Bill in Indiana