how to sell player at negotiotions?

[Bluebird Hewitt]

Is there anyway to block my players from Nego? I'm suffer from this with about 10 requests a day

I wouldn't mind knowing if there is something like this in the pipeline (an automatic reject by certain filters). I don't mind people offering for my players, but at least make me an offer that's worth my attention, not a £2.3m no token offer for my £2.5m striker.