This time of year there are so many people looking to buy TI 83 calculators - and other graphing calculators - that the prices often spike. So it's important to know where to go to make sure you're not paying a fortune for your calculator - and you don't have to buy a used one to get a good price. If you know where to go, you can get a brand new out-of-the-box one for the same price or certainly not much more. Why buy the TI 83 compared to say the TI 89?
Well, the TI-89 is of course more expensive, but it is a much more advanced version. It depends on what functions you'll need. The most basic difference is that the 83 is numeric while the 89 is symbolic. The TI 89 also has a stronger processor and many of the functions you would add to the TI 83 come already installed on the 89.
If you need functionality for multivariable calculus, linear algebra and 3D capabilities, then it would be better to pay the extra and get the 89. But if you're on a budget and if you don't need it to symbolically solve equations or to do integrals, then you might want to buy TI 83 - you can upgrade it as and when you need it, although do bear in mind there is a limit due to the size of processor.
Another point to be aware of is that the TI 89 is not allowed in some classes where the TI83 and TI84 are allowed, so it's a good idea to check this if you've decided to get the 89.
How to buy TI 83 and other graphing calculators for the lowest price
To get the very best prices, you could try checking out pawn shops in your area - people have managed to get some really good deals on calculators this way. There are various sales and deals on the internet as well. You can buy online at the Texas Instruments website for around $130 but you can definitely get them a lot cheaper than that.
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