I use qwant, mainly because its european. The quality is not that good imo, but its ok for my usage

Sounds good, I have a website that could need such data, but I have strict requirements for availability, costs and privacy. So best would be to self host or have a open api, do you offer something like that or is your code open source?

Where did you get these prices and basically the whole data from? Seems like AI just queried a few websites and put it together or did you manually check it?