The second and third codes just reported invalid. I'm not going to bother with the rest since it takes so long to input these with a controller. May want to strike these two off the list though.
MB92H-K87VW-KKMB2-6JQG2-JFBCJ
T326P-KYXD2-4QVJ8-BCTTB-MFWJW
Yes Gameware takes used games. I try to buy new games there as much as I can because they are a mom and pop store and they seem to really care about good games vs. selling whatever the flavor of the month is.
I've actually had them tell me stuff like "yea, we just got that game in... but don't...