Most people who have cases and manuals for better titles aren't willing to sell them cheap; and disc-only is a hard sell unless you have a hot game. You could try making a second order of the games though, Gamestop will usually allow you to marry the CIBs (if they exist) to the B2G1 and return the disc-onlys.
-------------------------
That night the Captain’s granddaughter
Would celebrate her birthday
“I’ve come a long way,” said the Captain,
“From Lost Christabel this night.
Accompanied by my dog familiar,
To blast your rafters with my surprise.
Granddaughter, It’s a foreign mirror
Taken from the jungle by crime!”
~ Blue Oyster Cult - Magna of Illusion
