where to buy established facebook pages?

I`m trying to find a marketplace or a person who I could buy health related facebook pages with 30k+ likes. Does anyone know a trusted marketplace where I could buy such pages?

I don't suggest buying Facebook pages, as it is no longer safe and Facebook has been banning pages like such. But if you're still determined to pursue this, you can look into Fameswap, ViralAccounts and BuyAccs -Micah