Yea, I did go back and check on these, and they do indeed have a *TC* indicator in the title. So they apparently are legit offerings. Still, there's not much to go on regarding their working order. Some clearly have missing tubes, while for the others there's no telling the condition of the tubes or the units in general. Oh well ...
(edit) I went back and checked all of the *TC* listings. A pretty bizarre collection of stuff, from multiple cesium standards, through old Heathkit stuff, Nixie-tube HP frequency counters, all the way down to a sheet of memo pad signed by Glenn Seaborg. What doesn't sell can be used to start a museum.