I want to buy or sell a company

Buy every french company :

https://www.fusacq.com/

Buy a website :

https://flippa.com/

https://exchangemarketplace.com/

Other : https://www.practicalecommerce.com/10-marketplaces-to-buy-and-sell-ecommerce-sites

If you wanna buy a website, this is the best newsletter to learn a lot (in french) : https://dotmarket.substack.com/