Friends, do any of you have a used but working T-1 84 graphing calculator you'd be willing to sell for a reasonable price? Big Child's honors math class teacher listed it as an "optional" purchase under supplies, so I'm thinking he ought to have one, but they're dauntingly expensive. I won't be in a position to acquire one until next week or so, and have found them for as little (HA!) as $99 on e-Bay, but a lot of you are rather smart and/or have grown-ish kids so I thought I'd see if maybe there was a win-win situation among my readers where one of you could use some cash for something you don't need. Name prices in comments (I won't publish them, so feel free to say whatever)? Thanks!
P.S. Sorry, but I'm not considering any earlier models; even if they're equally capable Big Child is rather rigid in his thinking and I don't want to blow his mind by having his look very different than his classmates' ones.
P.S.2. I am aware that there is emulator software to be had that would turn Big Child's laptop into a T-1 84 doohicky, but ideally he needs to be able to take it to class with him.