Middlesbrough have been no strangers to splashing the cash in recent years.
Whether it was during their promotion to the Premier League, that year in the top flight or the challenge to try and compete in the second tier after coming back down, it’s been quite a ride for supporters.
Unfortunately not every transfer has been what you’d describe as ‘a good deal’ in a financial sense.
We took to Transfermarkt to crunch the numbers, but which of these former players were sold for a higher fee than they were bought?
Have a go of our quiz and test yourself!