Does anyone here on fedi work for a (preferably small) online retailer, and want to pull some strings internally to get me a price feed? I don't really care what format it is in, and country doesn't matter either. 
I'm trying to make a non-commercial product price comparison site (I'm absolutely sick of the affiliate spam everywhere and "just use Amazon" isn't good for society either) and it's extremely difficult to find public price feeds for anything.
The point here is to have a credible place to point people at when they ask "okay so where do I buy $thing then" that isn't itself a store, because monopolization is bad for everyone and 'ease of search in one place' is a big part of why people use Amazon. But writing price scrapers is taking forever!
@joepie91 someone did grocery price comparisons between chains and over time for Denmark and Austria and both have a git repo with source code, although I haven't checked the source to see how they get the data
@joepie91 I've been meaning to get Soundohm on google shopping for some time (ew, but sales are sales). Perhaps I'll get to that soon.
In any case starting with a parser for their (awful) TSV format is probably a good idea.