But what is the market value of the Rams' current squad? Based on valuations by www.transfermarkt.com, we take a look at who is worth what.
The striker signed from Ipswich has struggled for consistent form but has proved a valuable player when called upon.
Lawrence has weighed in with a good few goals for the Rams but suspension and injury have hampered him at times.
Johnson was one of Derby's most expensive signings but has struggled to make a midfield spot his own on a consistent basis. His contract expires this summer.
Mount isn't Derby's to sell given he's on loan. Would he command more of a fee than 3.6million should Chelsea opt to sell him though? Some may say so despite Mount's young age.
Huddlestone is 32-years-old but his experience at the top level and the quality he still possesses would still command a decent fee were he to move on, although his contract is up in the summer.
An experienced goalkeeper with plenty of international and top flight pedigree could well cost a good fee should anyone want him.
Another whose contract is up in the summer, Ledley has faced a few injury problems since arriving at Pride Park.
Has impressed at left-back when called upon since arriving from Huddersfield.
Has been hit and miss since arriving in the summer from Brentford.
Signed in the summer, Marriott has scored lots of goals for Derby including against Manchester United, Chelsea and Southampton in the cups. Plenty of Rams fans may value him much higher.
Another loanee, Liverpool would no doubt want a decent amount of money for a youngster who has been very impressive at Championship level. Could they even want him back for good in the summer?
Hasn't featured under Frank Lampard and if not shipped out on loan, could raise a couple of million for the coffers if sold permanently, although his contract expires in the summer.
Keogh is 32-years-old now but has two-and-a-half years left on his contract and, were Derby to sell him, would still command a decent fee.
Wisdom's versatility has seen him play in three positions this season for Derby and he's a valuable member of Frank Lampard's squad.
Tomori is another on loan from Chelsea and his potential could mean his value will rise before too long but he's impressed in his time at Pride Park.
The skipper is 33-years-old now and has suffered from a string of injury problems this season.
The striker's contract expires in the summer and at 33, it'll be interesting to see if he gets a new one at Pride Park.
Another not to have featured under Frank Lampard but has 18 months left on his contract so either a loan move or getting some money in the coffers for the Rams would be on the cards for the Scot, it would seem.
The 32-year-old has been a big part of Derby's midfield but his contract is up in the summer. Could an extension be the way forward?
The Scot is out for the season having had a good start to the campaign.
Now establishing a place in the team having suffered an injury on his debut.
Has impressed since breaking into the team in the last couple of months following his move from Scunthorpe. Good potential if he can keep his place.
Injury has kept him out all season and his contract is up in the summer. The Rams could well let him go once the season is over.
Did well in a loan spell at Aberdeen and will no doubt get more games for the Rams before the season is out, ensuring his stock could rise.
Was doing well and getting the odd goal before injury struck and may struggle to get back fit this season.
Broke into the team and became a regular after coming through the Rams academy. His reputation rose with each game early on in the campaign and Rams fans may see his current market value as a bit of a snip.
Has just returned from a loan spell at Oxford. The 24-year-old still has two-and-a-half years left on his contract so it'll be interesting to see if he remains to fight for his place.
Has made the odd cup appearance but his contract is up in the summer.