[quote name='KemperJones']I'm contemplating doing the trade-in myself, and rebuying when it's cheaper. However, when you factor in tax, it's only a ~$7 gain. I also don't think my kids will be OK with not having it for a few weeks. It's the main game we play together.[/QUOTE]
If you and your family still actively play it, then it definitely wouldn't be worth it to waste your time. I sometimes go months between playing, and that's only when I have friends over. I figure I'd get the most out of it now while I still can, and re-buy it if I need to down the road.
Same with trading in RDR last week. I saw it was $30 still, but I knew it couldn't be long before it dropped with the inevitable GOTY edition. Sure enough, it dropped days later. I'll get the standard edition down the road, or even rent / buy it used, if I ever want to play it again.