Czech giants Sparta Prague will only accept €12 million for the services of striker Benjamin Tetteh.
Turkish giants Galatasaray are willing to play €8 million but that has been rejected.
Sparta Prague want to cash in on former Ghana U20 star whose style of play has been likened to his idol Didier Drogba, a former Chelsea star.
Galatasaray coach Fatih Terim is understood to be a fan and has earmarked the young Ghanaian as his No 1 option for this window.
But it is unknown if the Super Lig side will be willing to meet his asking price.
Tetteh scored nine goals in 15 league matches before the winter break.