Complex sentence: It was the manager who let him leave Liverpool, Graeme Souness, who wanted Marsh's signature and he got it for £500,000 on 26 June 1995 taking Marsh to Turkish side Galatasaray.
Split into simpler sentences: It was the manager who had allowed him to leave Liverpool, Graeme Souness, who wanted Marsh's signature. He got it for £500,000 on 26 June 1995, taking Marsh to Turkish side Galatasaray.