I'm a freshman now in college and I'm looking to buy a scientific calculator, since graphing calculators aren't allowed in my exams. I've been running through high school with my TI-89 in class, though in senior year I became interested in RPN and have been using an HP-48 emulator for Android in RPN mode just for kicks. However, the cheapest RPN calculator by HP is the 33s, which is running at $40. (and I'd prefer a 35s since they look much nicer and are more advanced but $10 more). Are there any non-HP RPN scientific calculators that are cheaper? Keep in mind, I need a physical calculator to use in exams, otherwise I'd just use my phone.