http://www.amazon.com/Dragon-Quest-VI-Revelation-Nintendo-DS/dp/B002I0GKIQ/ref=reg_hu-rd_dp_img
I'm sorry if this is not a deal, but I'm pretty sure this was going for about $35-$40 just the other week.
i think i would beat the game really quick and sell it, making it a better deal for me. wonder what the chances are it would come with the game case. probably zero.