I was about to start a college calc course but didn't want to chalk up over $100 for a calculator that I will only use for one semester. Thanks to this site, I was able to get one for half the price, and after the course I will definitely sell it back to them through cash4calcs. Win-win. Thanks for making my boring math class more affordable!
I sent in my pink Ti 84 + and received payment within 3 days. I was surprised by the service and will definitely use it again after my college math course :)