Brighton have reportedly had been chasing the forward, 25 since the summer but it is believed that the Seagulls have beaten Leeds United to the signing of the Scot in a deal worth believed to be £2,500,000.
They had been chasing Ben Marshall of Blackburn Rovers but have turned their attention to Murphy after ending any interest in the winger.
It would has as a huge loss for Sheffield United fans but we hope that the cash will be re-invested back into the squad.