The thing is, i agree with you on that. 30 million is massively over priced for a player who hasn't proven anything so far, which is where i think the fee has been over inflated in the media to make the lad sound better than what he is.
The deal if/when it happens strikes me more of a getting in early deal rather than buying a top level goalkeeper if that makes sense. Like if we went in for Forster or Butland now, the price would be higher (assuming we aren't spending 30 on pickford). So in regards to that, the scouts have probably said the lad has big potential, and we are signing him now rather than 3-4 years down the line when his price tag goes up simply because he is english, not that it isn't already.
That is the way i see it anyway.