Over the years, the Premier League has seen some big transfers.
In fact, three world record transfer fees were spent on players on this list.
These transfers didn't provide much value for the money, showing that more money doesn't always get you better results.
The signings on this list are big money deals that have failed rather than just poor signings.
So, here's a list of 10 of the biggest busts in the history of the Premier League transfer market.
Francis Jeffers, Arsenal (pictured)
Albert Luque, Newcastle
Sergei Rebrov, Tottenham
Jean-Alain Boumsong, Newcastle
Chris Sutton, Chelsea
Hugo Viana, Newcastle
I could go on.
Stan Collymore signed for Aston Villa in 1997 for £7 million, a club record.
Over the next three years he scored seven goals in 46 games. At almost seven games for each goal, this record is nothing to be proud of.
Unfortunately, during his time at Villa, Collymore suffered from clinical depression and spent several weeks in hospital.
After three very unsuccessful years at Villa, he left on a free transfer.
Michael Owen netted 118 times in 216 games for Liverpool. A season at Real Madrid wasn't unsuccessful, and Newcastle's £16 million buy seemed to be a good, if expensive, deal.
However, regular injuries, including a whole season out, meant that Owen played just 71 times in four years. He contributed just 26 goals.
That's about six goals a season.
Owen also caused Newcastle problems with both FIFA and the FA in the "club vs country" row as well.
Owen's signing proved to be a big mistake, £16 million for 26 goals wasn't what Newcastle were expecting from one of Europe's leading strikers.
After Newcastle were relegated, Owen moved on a free deal to Manchester United.
He still hasn't reached the heights of his Liverpool days.
Crespo signed for Chelsea for £16.8 million in 2003. He managed 12 goals in 31 appearances in his first spell at the club.
After one season, he was loaned out to AC Milan. He came back to Chelsea for a year in 2005, scoring 13 times as Chelsea won the league.
However, he requested a return to Italy and was sent on loan to Inter Milan until his contract expired.
Crespo spent three of his five contracted years at Chelsea out on loan.
That along with 25 goals for £16.8 million earns him his spot on this list.
In a six-year spell at Tottenham, Keane scored 80 goals in 197 matches.
Liverpool decided to sign Keane for £19 million in 2008. He contributed five goals in 19 appearances in his half season at Liverpool.
In January 2009, he returned to Tottenham for £12 million.
He then moved on loan to Celtic, scoring 12 times in 16 games. That must have angered Liverpool.
In six months, Liverpool lost £7 million and paid over a £1 million per goal.
He was a thoroughly unsuccessful purchase.
Robinho was bought for £32.5 million in 2008. His contract is worth £160,000 a week and runs until 2012.
Robinho started off well enough; he managed 14 goals in his first season in the Premier League.
The next season didn't go as well.
He was injured for three months and played just 12 games. He scored one goal that season in the FA Cup against Scunthorpe.
Unsurprisingly, he fell down the pecking order and was loaned out to Santos.
While there, he has scored 19 goals in 17 matches.
So far, City have got themselves 15 goals for £32.5 million and £160,000 a week.
Not a good return at all.
Brazilian striker Jo had been successful at CSKA Moscow, scoring 30 goals in 54 appearances.
That record was good enough for Manchester City to splash out £18 million for the young striker.
As it turns out, it wasn't a good idea.
He contributed just one goal in nine games for the Manchester club.
City chose to loan him out, first to Everton, and then to Galatasaray.
At a rate of £2 million a match and £18 million a goal, Manchester City have got themselves a very bad deal.
Adrian Mutu looked to be a good buy for Chelsea in 2003.
He had been successful in Italy, and all seemed well when he opened his Chelsea account with four goals in three games.
After that, however, his performances fell away. He totaled two goals in his next 24 games.
For Chelsea, it was worse than a simple loss of form.
Mutu failed a drug test in September 2004, testing positive for Cocaine.
Two months later, he was sacked.
After signing with Fiorentina in 2006, Mutu's career seemed to be back on track, scoring 50 times in 91 games.
However, another failed drug test, along with a long legal battle with Chelsea means that Mutu must pay Chelsea about £16 million in compensation.
Chelsea may never see this money.
Even if they do, Mutu has proved to be a thoroughly bad signing.
The French striker was Fulham's record transfer when he was signed for £11.5 million in 2001.
He scored 11 goals in 54 games for Fulham.
He was then loaned out to Marseille, with Fulham still paying his wages, before they finally canceled his contract.
A goal every five games was so poor that Mohammed Al Fayed, the Fulham owner, took Jean Tigana, the manager who had signed Marlet, to court.
Al Fayed lost the case, making the signing even worse for him and Fulham.
Schevchenko was one of Europe's most highly rated players when Chelsea spent £30 million on him in 2006.
Since then, his reputation has fallen somewhat.
Rather than the goal scoring machine who scored 127 goals in 208 matches for Inter Milan, Chelsea got nine goals in 48 games.
Chelsea seemed to sign him just as he lost his pace and developed injury problems.
Whatever the cause was, in his final season at Chelsea, he managed just five goals in 17 games.
After an unsuccessful loan back to Milan, Schevchenko returned to his first club, Dynamo Kiev.
£30 million for 48 matches and nine goals makes this a bad deal.
Chelsea's record signing is arguably one of the worst pieces of Premier League business.
A double entry for the Argentinian midfielder earns him the top spot.
Manchester United splashed out £28.1 million for him in 2001. He didn't fare well in the Premier League.
He was unable to cope with the faster paced English game, not getting as much time or space on the ball.
Two years after signing for Manchester United, Chelsea spent £15 million on him.
That his value had dropped 50 percent in two years is an indicator of his lack of success at United.
Things didn't get better at Chelsea.
He made just 14 appearances, contributing a total of one goal.
That means that Veron cost Chelsea over £1 million per appearance and £15 million per goal.
After two loan spells to Inter Milan and Estudiantes, Veron left Chelsea for free to Estudiantes in 2007.
Manchester United and Chelsea wasted a total of £43 million just on his transfer fees.