Ok, so first off, not a lot is going to change in the market between now and two weeks from now, (mid december). That said, you might as well buy one now, only because people normally benefit from laptops sooner rather than later. Yes, you're working with a fairly low budget, but if you're going to do "very light gaming", you should be all right. Also, remember you're going to have to settle for a fairly small screen, roughly 11-13 inches... I do think a 7,200 RPM HDD is impossible in the $450 budget, but I've been wrong before.
Anyway, here's a place to start. See if you like anything. You'll also get a better idea of the kind of specs you can get in your price range. Take a look and let me know, otherwise we'll find you something else