> It would be good to know on which listings Amazon is the seller That's a good idea, it is actually possible to get that information, it's called merchantinfo

> It would be good to know on which listings Amazon is the seller That's a good idea, it is actually possible to get that information, it's called merchantinfo in the API [1]. I'll consider adding a column for the seller(s). [1] https://webservices.amazon.com/paapi5/documentation/offers.html#merchantinfo https://webservices.amazon.com/paapi5/documentation/offers.h...