It's worth remembering that before we signed Rooney it was almost consensus on here that 1) we didn't need him (we had Ruud, Saha, Smith, Rossi at the time) and that 2) £30mil was far too much. You can re-read the thread on here (I think I was saying much the same at the time). A player with as much ability as Sancho, who has proven himself to a high level despite his young age, and has at least 10-12 years of football in him, is analogous to Rooney's situation, although the transfer fees have of course gone mental in the last few years. He'll be worth it, though.