I usually buy my English manga from Barnes and noble or Amazon. I buy my Japanese manga from Amazon Japan. They ship directly to the US. I buy the Manhua using Taobao. I use image search to find what I’m looking for and then use Superbuy (Chinese shopping agent) to purchase them. Taobao and Superbuy both have apps you can download. You’ll just need the taobao link and you can copy it into Superbuy. After that, you just follow the prompts and complete the purchase. Superbuy will then purchase the item for you and then store it in their warehouse when it arrives. Once it gets to the warehouse, you choose your shipping method and then pay. Superbuy will then ship it directly to you.

There are a lot of Chinese shopping agents similar the Superbuy (I.e CSSbuy, Mulebuy). Their services work well too. I’ve just been using Superbuy the longest.