If it's what you want, check daily and be patient. I think it will be $499 again because that's a reasonable price for a non-suspension model and probably won't sell for more than that (meaning I think most people will not pay the higher price and, as a result, the price will come back down). I wouldn't expect the price to go much lower than $499, so if you see it at that price again, jump on it before it sells out or is discontinued.
Can't say, and I could be wrong in my assumption that it will go back down. I stand by my rationale; I just don't think many people would pay $599 for a bike that basic, but that doesn't mean Wally must lower the price anytime soon. I could even be totally wrong and people may be buying them at $599, even though they could get a Pro Series 212 for not much more ($138 more, best deal I can find).
Amazon, $806.92, $70 off with approval for an Amazon Visa ( a good card to have, especially if you order often from Amazon ) making it $736.92. I see that you are too young to get your own credit card; wish I had that problem! (I'm 5x your age)