We have been tracking the prices of over 12M items every day. In 2016, we started with Pricearchive tracking about 12 million AliExpress products every day. Among the data we tracked were price, title, number of pieces, price in euros and dollars, discount size, product pictures and more. After a while we started tracking 16 million items. At the time these numbers seemed enormous to us. But after a while we realized that this was not the limit and there were products that we were not tracking. This led to an increase in the base of tracked goods and caused a marked increase in revenues from related activities
https://www.pricearchive.org/