What valuation? I've not read anywhere Newcastle have put a valuation on Livranento, nor I've I read they are prepared to sell him. I have read that he's said he's happy at Newcastle and he's making no noises saying he's unhappy and wants out. Maybe he's one of those rare players who will remain loyal to his present club despite big money offers from other clubs trying to entice him away for more money. Remember when Madrid and Barca where almost constantly linked to Silva and Aguero? They remained loyal to us when they could have gone for more money better weather and both bigger clubs than us.
If we are serious in wanting him I'm sure Newcastle will offer him a better contract. It's not all about money though, and he's on 50k per week at 22 years old. Won't be long before he triples that at Newcastle, City, or anywhere else. Newcastle are no longer a selling club and could soon start outbidding clubs for top players.