Different payment system for each product, Prepaid only for some products (no cod options). Cod and prepaid for some other product and cod advance payment system also (₹2000/- purchase, ₹200/- advance) Not all products are our own stock! We buy products from seller who offer the best quality products at the lowest prices (According to the orders), Therefore it is not possible to provide Cash On Delivery for all products If you can, please add a feature like this soon