Don't think 16GB will do? The refurbished 32GB iPad Wi-Fi + 3G is $429 shipped. (For what it's worth, I've been able to get by just fine with 16GB--but I don't stuff my iPad with a ton of music and video.) Curiously, the 64GB model is also showing a price tag of $429, which is particularly awesome, but it's currently out of stock.
Great as these prices are, there are a few things to consider. First, these are online-only deals, so you can't just walk into an AT&T store--not a big deal for most folks. Also, you'll probably be on the hook for sales tax, same as if you were buying from Apple.
But the real downside here is AT&T's warranty: 90 days, versus the one year you get on refurbished gear from Apple. Of course, Apple charges $479 and $559 for the 16GB and 32GB iPad Wi-Fi + 3G, respectively, so you're saving a considerable chunk of change by accepting a shorter warranty.
My thought? Totally worth it.… Read more