Comment by quag
2 days ago
I agree with you on the Casio fx-115ES Plus 2nd Edition. I picked one up two years ago for $11.41. It naturally writes out equations, has a backspace and is generally excellent. I still love my HP RPN calculators, but the fx-115ES works nicely for anyone who isn't using RPN or sympy.
Also a +1 for this calculator, it's really the best scientific calculator you can buy and a steal at the price it sells at.