Reference: Fataawa wa Rasaa.il Mukhtaarah – Page 416
Question: What is the ruling regarding the one who buys stolen goods, knowing they are stolen?
Response: It is not permissible for the Muslim to buy goods which he knows are stolen; This is haraam, because by doing so he is aiding [and abetting] the thief [in sin and transgression].
Allaah (‘Azza wa Jall) says:
{Help you one another in al-Birr and at-Taqwa (virtue, righteousness and piety); but do not help one another in sin and transgression}, soorah al-Maa.idah, aayah 2
And with Allaah lies all success.