why can't I find a TI-85 scientific calculator brand new somebody help me please

Hi, the TI-85 was replaced by the TI-86, which is also discontinued. I have a TI-85 and a TI-83 plus for sale on Amazon. In my opinion as a Math Prof., the TI-83 plus is just as good or better. Just my opinion.

Does the calculator have the rref function?

Yes, it does have the rref function for matrices.

how is the viewing screen. any flaws

I have noticed I continually have to turn the contrast up even though I never turn it down. Maybe it's the heat where I'm at (I notice I have to do it more when I've kept the calculator in my car during summer months) or some other outside cause but once the contrast is turned up I am able to view everything on the screen just fine.

Texas Instruments TI-85 Advanced Graphing Scientific Calculator

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