Well, I went ahead and got it! After talking to them on the phone, they said the meter was spot on, but the battery check didn't work. I was a bit confused, but they said the meter works, so that was all I cared about.
Turns out that yes, there is no battery check switch. The battery check is the same as the FM and similar. If it lights up, the battery is good. The switch is for night illumination of the viewfinder info.
Regardless, it seems a perfectly fair deal for KEH and me. It's missing one feature, night illumination, which is about the same level of annoyance as a bad battery check.
I'm happy with it! Never laid hands on such a fine mechanical instrument. Very nice condition. Fell madly in love.
But it turns out to have a broken tripod mount and the AI tab will not lock in the up position. It's back at KEH and they are repairing it under warranty!
Good deal.