Lol @ the apologism.
Of course Porro is worth 45m. He's crucial to Sporting, we have a dearth of quality in his position & there is a lack of quality options at RWB who are available to us. He is young, has played well in Europe & offers precisely what we need in that role. It's not 2012, this is the market price for talent. Look at all the other big talents who left Portugal - Fernandes, Nunez, Dias etc. All over 40/50m.
Top clubs pay release clauses/over the odds to get their man all the time anyway, it's what they do because they understand that getting them in rather than wasting months haggling for 5/10m is beneficial and helps the team win trophies.
If we think this player is someone who makes a difference, then 45m is fair. If not then fucking move on from negotiations. Was Ben White worth 50m? No. But Woolwich paid and now he's key to them. We haven't spent a penny all window, we're hundreds of millions off FFP rules and we have money, yet some of our fucking fans sit around wanting to help the owners count pennies.