Article in english: https://www.lemonde.fr/en/les-decodeurs/article/2023/02/23/forever-pollution-explore-the-map-of-europe-s-pfas-contamination_6016905_8.html

You still have to talk to the seller, backmarket is the seller, you shop and click and it’s delivered, 0 risk of getting scammed (outside of the platform scamming you)

There is backmarket for thoses afraid of meeting fellow humans in order to do a transaction.

There is also a big markup on the price.