Like Nat said, expect to find this with lots of games. I chuck mine as well, mainly out of total contempt for collector types. I only keep them if they say something neat (like CvS2 for DC).
My copy of Macross: Flashback 2012, which I bought new, had an obi that was like a little triangular hat that went on the corner. I sold it on eBay for $5, mainly just as an experiment. It did bring the net cost of the LD down $5, from $95.