I see it all the time "cassette not tested" due to not having a cassette. You can test without a cassette to se if it works you just cant test the sound. WTF??

Yeah it totally shits me when i read that in a description, it usually means that the cassette doesn't work and some dude who knows what he is doing it trying to pull a few more $$$$ for his items, by playing dumb

I have come to the same conclusion,that thouse who write that to their add on example ebay

probably know that the item is not funktioning.