The west London outfit reportedly had a bid for the youngster rejected in January but have now seemingly been encouraged to return by the Russian club's manager
The Blues reportedly had a €20m bid for the Brazilian turned down in January but have now seemingly been encouraged to return for the 23-year-old.
"They have to pay the price," Lucescu told reporters. "They have to pay the price because we bring the players here at 17 or 18 years old.
"We pay a lot of money because they are talented players and we bring them up. I have 23 or 24 [players like that], not only Willian.
"Luiz Adriano, Douglas Costa, Alex Teixeira, Dentinho, Alan Patrick - they are very young and they are already prepared to win the championship with a good mentality.
"They have played a lot of matches in Europe and they have a very, very good value. If Chelsea pay his [asking price], I am not against letting my players play for the big clubs.
"If they pay the price, he can go. If not, he will remain here because he has another two-and-a-half years on his contract."
Lucescu went on to insist that the west London outfit will not get their man for a cut-price fee due to the "education" he has received since moving to Russia.
"It is not my problem. It is the problem of our club and Chelsea," he continued.
"But if Chelsea want to take good players that are very well educated then at Shakhtar we have a lot of Brazilians.
"It is not only the performances they have done here but their education, which is very, very important.
"For us, every transfer is very difficult because we take a player of 18 years without a European education."