The For Sale forums are closely watched by the moderators (as are the other forums), so if your item does not belong, it will soon be deleted. Then you will know for sure, that is unless it was deleted for another reason, see For Sale forum rules.
However, since that is actually a legitimate 'tool' of the trade so to speak, I would think you would be just fine posting it. Also, I believe that specific meter has been discussed and recommended in a couple of threads here already so I would think that would be even more reason it should be ok, IMO.
I am also reasonably certain I have purchased a few hand tools from the For Sale forum here, within the last couple of years.