In general, I think Adorama's ratings are very fair in terms of glass but only fair to slightly optimistic in terms of cosmetics (but I still buy used from them) and KEH's tend to be very fair to pesimistic (as in, it'll be better than they say)
My Minolta 807si from KEH was rated EX+, but I'd call it mint. It's that good. OTOH my last used camera from Adorama was a Pentax ME Super that they rated E+... generously.
In life you only get one great dog, one great car, and one great woman. Pet the dog. Drive the car. Make love to the woman. Don't mix them up.