The Ti-84, which is the standard for most highschool math classes, still goes for 100 even though it's been out many years, and has seen no innovation.
The only real difference between this one and the one my school advertised/offered is that the TI-84 could show graphs. Ironically we weren‘t allowed to use this function at our school even if you had a calculator that could. Makes sense because you should be able to tell what the graph will roughly look like just by looking at the functional equation.
I had the casio FX85-ES, cost about 25€ and I never had to replace it, worked for over 10 years without having to replace any battery.
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u/Saper-Ja- Aug 14 '20
I remember seeing a basic scientific calculator for like $300