He's only got two, the original EP "My name is Skrillex" and "Scary Monsters and Nice Sprites." You can find the first one legitimately free because he released it that way, the other one was released as a normal album.
He's supposed to be dropping a new one relatively soon I believe.
His remix of cinema by benny benassi is pretty ****ign good.
This. Although, if he would have left the "buildup" of the drop, then the drop out, i wouldnt have been mad. the whole song is good dont get me wrong. But, the beginng vocal segment is just soo damn good