[pjc50]

> As a side project to this: An API that will take a list of EAN-13 barcode, a price and a quantity (in stock) and transform it into a number of feeds for various price comparison sites

From this: do the people who have the data have an incentive to make it available, or to keep it unavailable so that price discovery is harder? The more efficient the market, the smaller the margins.

This is a big factor in many things that don't have APIs or actively discourage automated access with anti-scraper tools.