“Till March, there were very few takers for second-hand desktops or laptops. However, once the online classes began in full force, there is a huge demand for used computers,” said K Ravikumar, an electronic shop owner at Pallavaram. He said at present, he was forced to print “attractive offers” in newspapers to purchase used laptops from people. “Our work does not stop here. We need to sell them again after the hardware and software services,” he said, adding, “I sell 10 used laptops or computers per month against one or two months ago.” S Manimaran, a hardware engineer, who assemble computers on customer request, also takes pain to go to Ritchie Street from Tambaram to get second-hand spare parts to make a computer ready for sale. “Due to urgency, some of my customers purchase only CPU units and buy monitors separately,” he said.