Ruben neves has around 40m release clause but I guess Porto might let him loose for 35m. Too expensive for someone so young but his been so good for Porto I think 25-30 max should do. We do take up a number of risks if we buy him, one of which I think will be he will take a while settling in, something clearly we can't afford.
His not a box to box but more like the one who plays well in DM role shields the ball, calm good technique and a nice range of passing. Still young, but very mature on the pitch... can't say much off it.