Here, bookmakers Paddy Power crunched the numbers to take a look at each League One club and their net spend over the last decade – and there are some pretty shocking results.
However, not every third tier club has net spend in the minus column - scroll down and click through the pages to view the full club-by-club break down:
19. Plymouth Argyle
Net spend over last 10 seasons: +£1,333,000 Photo: Dan Mullan
20. Fleetwood Town
Net spend over last 10 seasons: +£431,000 Photo: Clive Brunskill
21. AFC Wimbledon
Net spend over last 10 seasons: +£588,000 Photo: Alex Burstow
22. Lincoln City
Net spend over last 10 seasons: +£114,000 Photo: Pool
23. Hull City
Net spend over last 10 seasons: -£13,7080,000 Photo: Nathan Stirk
24. Sunderland
Net spend over last 10 seasons: -£62,740,000 Photo: Chris Brunskill