Yes, you can buy a TI 84 graphing calculator for less than $30–used! I use graphing calculators in Chemistry. Our teens in Co-op use graphing calculators for math. I have a caddy with used TI 83 and TI 84 calculators. Some are for class; others I lend for the year. My target price for a TI 83 calculator is $15 and $25 for a TI 84–total with shipping! First, only bid on models which have been tested! Do not bid on models with shadows on the screen; these devices are close to dying. Always check the shipping before you bid! I’ve had the best luck buying from Good Will online; however, I’ve bought calculators from eBay and Amazon. The only used TI 84 I bought from Amazon was a dud. It was gritty from spilt coffee. It does continue to work, though. We’ve used the calculators for years. A few of the older TI 83 devices have broken. I save covers from broken models as replacements. Since I didn’t pay more than $15 for a TI 83, I’m not upset when one breaks. (BTW I lend the TI 83s to take home—not the TI 84s.) i did a bit of research on used models. I stand by Good Will for reliable calculators.
I just bid and bought two TI 84s fro Good Will. Yes, I was outbid on other lots. I’m patient.
Amazon has a listing for a TI 83 at $20 with shipping.
eBay has a listing for 12.99.
I have a rechargeable TI 84, like this one from Amazon. It’s a pain because it doesn’t hold a charge well. I think that’s why the used price is so heavily discounted.
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