Check the battery area
Old alkaline leakage can destroy value. Open the compartment and inspect every contact before paying.
Used calculator research
Graphing calculators: identify the edition before you price the flip.
A TI calculator can look valuable and still be the wrong model, damaged or crowded by competing listings. Start with the exact edition, then verify working condition and current demand.
Reviewed July 17, 2026. Recheck exact-model sold results before every purchase.
Model lookup
Common graphing-calculator research lanes
The field-kit lane uses a C$10-25 starting buy cap and C$45-140 broad sold range. Exact model and condition decide where an item belongs inside or outside that range.
| Model | Starting max pay | Check before buying | Current market |
|---|---|---|---|
| TI-84 Plus | C$10-20 | Battery door, clean contacts, readable screen, working keys | Sold results |
| TI-84 Plus CE | C$15-25 | Charging port, rechargeable battery, screen, exact colour/version | Sold results |
| TI-Nspire CX | C$10-25 | Distinguish CX, CX II and CAS versions; confirm charger needs | Sold results |
| TI-89 Titanium | C$10-25 | Screen contrast, battery contacts, all keys and slide case | Sold results |
Do not price from active listings alone. A high asking price is not proof that buyers are paying it.
Separate the versions
TI-84 Plus, CE, Silver Edition, Nspire and CAS variants are not interchangeable search terms. Use the exact front and rear labels.
List the test status
Photograph the powered-on screen, model name, battery compartment, ports and any missing cover or cable.
Quick answers
Used graphing calculator resale questions
Which calculators should resellers research?
Common candidates include the TI-84 Plus, TI-84 Plus CE, TI-Nspire CX and TI-89 Titanium. Exact version, working condition and current sold listings determine whether a specific calculator is worth buying.
What should I test?
Confirm it powers on, the screen is readable, keys respond, battery contacts are clean, the battery door is present and the exact model or edition is identified.
Faster model checks
Carry the searchable buy-cap table in-store.
The C$9 Frayvo Field Kit includes calculator, remote, ink, gaming, camera and replacement-part lanes with phone-friendly research links.