Either they are invisible or users don't want to bid for such players, but I have been checking the negotiations tab regularly since the negotiation window was opened and have I not seen even 1 offer on any player in the list (no activity at all). Another thing I noticed is that there were players of 97-98% in the list too. I have (or had) some players on 97%-99% in my squad too but no offer came so far. It seems that negotiation is dead here, which comes back to the question: why not remove it completely and replace it with something more useful for the mass; it seems that only those that exploit using multiple accounts on the same server are the only ones that can benefit from this feature.