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Texas Instruments TI-89 Titanium Graphing Calculator Black w/ Cover Works READ - Picture 1 of 10
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Texas Instruments TI-89 Titanium Graphing Calculator Black w/ Cover Works READ

Gazco Goods
(1299)
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US $44.99
ApproximatelyAU $68.73
or Best Offer
Condition:
Used
More information - About this item condition
“Seems to be working, but screen has a line of dead pixels - see pics. Includes cover. Cover rubber ”... Read moreabout condition
Last one1 sold
Other people bought this. 1 has already sold.
Postage:
US $6.99 (approx. AU $10.68) Economy Shipping.
Located in: Pittsburgh, Pennsylvania, United States
Delivery:
Estimated between Sat, 16 Aug and Wed, 20 Aug to 94104
Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the postage service selected, the seller's postage history, and other factors. Delivery times may vary, especially during peak periods.
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No returns accepted.
Payments:
     Diners Club

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eBay item number:226835364224
Last updated on 05 Aug, 2025 08:15:34 AESTView all revisionsView all revisions

Item specifics

Condition
Used
Seller notes
“Seems to be working, but screen has a line of dead pixels - see pics. Includes cover. Cover rubber ...
Brand
Texas Instruments
Key Size
Regular
Type
Graphing
Display Size
Regular
Power Source
Battery
Size
Handheld
Model
Texas Instruments TI-89
MPN
TI-89 TITANIUM
Features
Calculus, Programmable, USB
Country/Region of Manufacture
China
UPC
Does not apply

Item description from the seller

About this seller

Gazco Goods

99.2% positive Feedback•4.1K items sold

Joined Dec 2008
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable postage costs
4.6
Postage speed
5.0
Communication
5.0

Seller feedback (1,041)

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    • d***t (22130)- Feedback left by buyer.
      Past 6 months
      Verified purchase
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    Product ratings and reviews

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    4.7
    416 product ratings
    • 356 users rated this 5 out of 5 stars
    • 37 users rated this 4 out of 5 stars
    • 6 users rated this 3 out of 5 stars
    • 2 users rated this 2 out of 5 stars
    • 15 users rated this 1 out of 5 stars

    Good value

    Would recommend

    Good quality

    Most relevant reviews

    See all 242 reviews
    • by warburrito
      13 May, 2020Top favourable review

      Works great for my high school son

      Works great for my son who is in high school. Apparently whatever model the teacher uses has a few keys that are in different spots so not every function works using the exact same keys, but that has not been a problem for my son. However, if your child's teacher uses a specific model I would suggest getting that model instead so that learning would be easier for someone not as technologically inclined as my son.

      Verified purchase: YesCondition: Pre-owned

    • by dadgum1
      14 Feb, 2017

      Powerful calculator

      This is a used item of course, so the only thing guaranteed is the calc itself. I'm loving the computer algebra system on it; taking DE and Linear Algebra this semester and never knew how much of a time saver it was. Solves for x, does operations for polynomials, factors, integrates and d/dx functions, trig extpansion, etc. Only thing thats kinda a pain is matrices, but you get used to it. Wish I had this earlier. Lot of other calcs have CAS, but this is at great price too. this website lists a lot of the features and gives you a good idea of what this calc can do and gets you started using fast as well: prenhall d0t c0m /esm/app/graphing/ti89/homescreen/Menukeys/f1 d0t html replace all the d0ts and c0m

      Verified purchase: YesCondition: Pre-ownedSold by: Vt793et9Q3O@Deleted

    • by msrobin2
      08 Sep, 2016

      Perfect for the engineering student

      If your studying engineering this is a must have, It has all the features that you need to succeed. with it's build in computer algebra system it can evaluate and simplify expressions, and display them as they would be written by hand thus making test easier. It returns all of the equations for a quadratic variable making it the ideal cheat-a-lator. well worth your time and effort to learn how to use this jewel.

      Verified purchase: YesCondition: Pre-ownedSold by: 222775

    • by sterlinghhartman
      21 Aug, 2019

      PhD Mathematician in Plastic

      Incredibly powerful \. You probably won't be able to use all of its functions. On the negative side: font showing date and time is incredibly small and there is no way to increase font size.

      Verified purchase: YesCondition: NewSold by: dealoff

    • by pokemon1216029
      01 Mar, 2018

      Really great calculator.

      The beauty of this calculator is that it can perform basic algebraic functions for you; no more binomial expansion or tedious polynomial operations. Makes checking work very easy, and is even approved for the SAT and AP examinations. And the price is right; used with barely any wear.

      Verified purchase: YesCondition: Pre-ownedSold by: nhfastcash

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