Manchester United have made some incredibly successful signings during the Premier League era.
For example, Roy Keane for £3.75million in 1993, Cristiano Ronaldo for around £12million in 2003 and Wayne Rooney for less than £30m a year later were all unquestionably excellent buys.
However, United have had their fair share of flops too.
Former Arsenal superstar Alexis Sanchez - who arrived as part of a swap deal that saw Henrikh Mkhitaryan moved to the Emirates Stadium - arguably belongs in that category.