I’ve been debating whether or not to upgrade my TI-86 calculator to a TI-89, which is nearly the top of the line as calculators go. It litterally does just about everything, including symbolic factoring, integration, and all sorts of cool stuff. Unfortunately, it has a $150 price tag. I finally decided I was going to buy it with a $10 BestBuy gift card (well, and my credit card to cover the rest ;-), so I went down to best buy and it was $147.99. But then I saw a package that had been opened, so it was marked down to $127.99. That pretty much swayed me – so I took it up to the register and they knocked another $18 bucks off of it! So I got it for $109 – totally awesome! Now I just have to figure out how to use it.