Good News, I got my 5 sensors in the mail yesterday. It's interesting what I got for my $20.70. So I thought I would share my discoveries with everyone.
All sensors were OS THGR122N
X units. Three of them NEW. (Still had the LCD screen protector on them). Two of them were not new with minor wear seen, but in very good condition. One of these two used units had batteries installed (the OS factory installed "Maxell" branded units), but one of the batteries was inserted in it's slot backwards.
I tested all 5 for transmit, and reception on my OS-WMR968, they all worked just fine.
I also noticed that one of the NEW ones, had a slightly different OS logo on the front.
One unit out of the five, which was one of the NEW ones, was a Celsius Unit Display, but again the WMR968 receives it as "Fahrenheit sensor" just fine
The back of that unit had slightly different printing on it compared to the others.
This is the Celsusis Unit's back....
This is the Fahrenheit Unit's back....
So it looks like I finally found a good bargain on ebay.