Edward J. Young was a towering scholar and a great lover of God's word. His three-volume commentary on Isaiah is a masterpiece, and you can get it at CBD for $17.99.
Of course, Young's insistent amillennialism does decrease the value of his treatment of the still-predictive portions. I first began reading through the set as a not-terribly-sophisticated young (no pun) Christian, and remember thinking constantly, "Good grief, everything can't be something spiritual about the Christian church!"
But that still leaves Young's very sensitive ear to the Hebrew text, love for the book's message, his interaction with the literature. I do wish a commentary of equal breadth and depth could be written by someone who combines those qualities with taking the text on its own terms, but that doesn't prevent me from commending it highly.
ALSO, they still have Charnock's Existence and Attributes of God for $9.99. This is a killer deal, also. If you've never read Charnock — whoa.
IN UNRELATED TAUNTING: ha-ha. Seems that old Blogger blogs are unavailable at the moment, and only new Blogger blogs are up. Like this one! It's Biblical (Hebrews 8:13)!