C2C Advanced Systems IPO: After a solid demand for the public offer, investors are eyeing the allotment for C2C Advanced Systems IPO which is expected to be finalised on or before Friday, November 29. Read C2C Advanced Systems IPO question and answer. Find C2C Advanced Systems Ltd. IPO date, price, allotment date, gmp, news and subscription. C2C, meaning consumer-to-consumer commerce, is a business model often defined as one consumer selling goods or services to another consumer. When done online, C2C becomes a type of eCommerce. C2C is consumer-to-consumer or customer-to-customer transactions. In a C2C model, buyers and sellers transact directly instead of through an intermediary. Online C2C firm sites include Quikr, OLX, and eBay, which sell products or services through a classified or auction system.