Yay! After realizing that I didn't have to have CGC 9.8 copies right away in my DC Bicentennial Set, I've been able to upgrade my set twice so far.
Last upgrade was from a 9.4 to 9.6 WP of Blitzkrieg 4 (adding 50 points to my set total) and now a 9.6 WP of Batman Family 6 (adding 52 points)! Wasn't sure about being able to upgrade from my 9.4 copy because the 9.8 versions have been listed at over $1,400 on eBay which is too much for me. But I saw a 9.6 WP version being auctioned on ComicLin