Thanks. First of all, if a transfer happens it will probably be more than this offer of ours, and as for the bolded:
To be completely honest, since I don't know the player at all, I rely on the expertise of our Dutch posters on here and they firmly seem to be of the opinion that he's not ready for such a move. Now you can argue, if he's not ready for the move any transfer fee would be too big, but a transfer above, say, 20-25m €, adds a lot of expectations to the mix which I anticipate him not being to fulfill, already because he quite possible won't get very much playing time in the first place.