Alibaba implemented competitive pricing strategy in comparison with competitors , they maintained the products prices little less compare to the competitors without dropping the price, which given healthy competition without losing the profit margin, for some fast moving products they given low prices yet good quality, some same products are available at different prices depending upon the suppliers well and wish.
Another sale boosting offers are “discounts and buy one get one offer” on some products on seasonal basis, offered value added services to the products like if you buy a mobile they will give you mobile case for free, all these pricing strategies helped Alibaba to grow.