I traded in some old DS games yesterday. I ended up with about $30, after renewing my discount card at the store. Firstly, I know I probably should have used Ebay, but...I didn't....this is what I did. I used the trade in value to get a used copy of WiiPlay, which was $30. Then, after I checked out, I realized that Big Brain is coming out today. I played WiiPlay last night and liked it, but don't know if it will last. Should I take it back? I would have to pay an extra $20 for Big Brain. I guess I was just excited to get WiiPlay cause you could use the Mii's, and I didn't have to pay anything extra for it. I was also looking at Mario Part 8, which would also be an extra $20 since they didn't have any used ones. What do I do?