YOU SAID:

she only will have said that it may have been cheaper

INTO JAPANESE

彼女はそれが安かったかもしれないとだけ言ったでしょう

BACK INTO ENGLISH

She would just say it might have been cheap

INTO JAPANESE

彼女はそれが安かったかもしれないとだけ言うでしょう

BACK INTO ENGLISH

She would just say it might have been cheap