On Amazon, clearly there is a tree where all the leaves are the products and you can narrow down a category to find the products.
For example, what I am looking is actually under the category
Cell Phones & Accessories, and then
Cell Phones and then
Unlocked Cell Phones.
Is there up-to-date public dataset that has the mapping between category and ASIN (Amazon Stock ID)? so one can avoid scraping a certain category page by page?