Why are diapers so cheap online?

My family has 2 packs of 54-piece Mummy Baby male models. I will resell them to moms in need at a low price. 2 packs of size M cost 100 yuan each. They are all gifts from others. My baby Don’t use this brand, the price is guaranteed to be affordable, and there is no postage. Moms who need it can send me a text message on the site, and I can send you photos of the actual product. []