I recently got a Sonic CD "not for resale" disc. Instead of having a blue front, it has a red one, and came in a paper jewel case the same size as a regular cd case. Is this worth anything? Was it a pack in? Is is rare? I am an avid Sega CD game collector with over 100 complete games and I have never seen this. If someone has info on this please let me know. Thanks, swlovinist