- 35 months ago
Hey guys, Cicero once again (and still poor). I have finally hit a wall with my old Casio FX-155ES PLUS, and I think it's finally time to invest in a real graphing calculator for standardized testing. My only issue: they're all over $100 and my mom isn't willing to drop that much on a calculator. Can you guys either recommend be a cheap calculator that works with complex numbers, graphing equations, etc. or a good place to find used calculators that meet my needs?