A buyer bought my laptop and paid me the money through PayPal, later I found out that the money belongs to someone else who wants to get his money back.
Now he's selling it on eBay classifieds.
What can I do?
Report to the support and take it to the police 🤷🏻♀️
Now. Nothing more.
You could have done something beforehand - namely what ebay classifieds recommends: only cash payment and personal delivery…
Typical "triangle fraud". There will be more to come!
For this type of failure, PayPal has seller protection. If you have a tracking number and sent it to the address stored in PayPal, then you have a good chance of getting the money back in a buyer protection case.