Do not send your calculator to these people. Do your homework and read reviews and check with BBB. I didn't do this and sent my calculator in. Theyre supposed to pay you in 24 hours, after two weeks never heard anything from them. I called after checking my tracking (and they had received it 2 days after I sent, 2 weeks ago), and Peter said he'd look through the packages received that they were backed up. Found it and said his boss was only person could put in payment and said he'd put it on top their desk so it would be paid via paypal within 24 hours. 1 1/2 weeks later, still no payment. Call again, Peter looks up info and says he'll put in payment that day, but, my calculator had marker on back and corroded batteries so were only going pay me $15 instead of the $47 (based on good value per their website). I informed him that I had valued it based on website and those items he mentioned were indeed part of the "good" value. He said yes that those things still gave it a "good" value, but that they said it has a minor scratch on the screen (that I probably didn't even see, was so minor). He then said he'd put the reduced $15.00 payment thru on my paypal immediately. No Payment yet. Two days later. Some reviews I've found, say they don't pay or pay very little, then resell them on their site titled sellcalculators.com. For a nice profit. I know my calculator did not have a scratch, but when I asked Peter if he hadmy calculator in his possession (I was going to ask for a quick pic) he said no he did not.