4. David Brooks (Sheffield United – Bournemouth)
Not the most glamorous name on this list, but an excellent piece of business by Bournemouth. Eddie Howe has been criticised for overspending on young players in the past – cough, cough Jordan Ibe – but Brooks is one of the most exciting young talents in the league.
A full Wales international, the 21-year-old scored 7 goals in 30 appearances for the Cherries and has the ability to unlock defences in the blink of an eye. Signing for only £11.5 million, his value has definitely tripled since arriving on the south coast.