I sent my calculator to these people, after i had estimated the price of my calculator in good condition warrenting an estimation of 45$ i got the payment in the mail by check right around 2 weeks after shipping my calculator so with the time the USPS takes it was pretty quick. When i got the payment it was only 16$, i contacted customer service who were friendly and explained to me why my calculator was appraised lower than i expected. I. e. Mine had scratches on the screen i hadnt noticed. Despite this we were able to work out a deal. They also showed good customer service and listened to my complaint and took the steps to fix it as well. They were kind and honest.