Can They Sue Me After Selling A Laptop Through Fb Marketplace And They Want Refund After 3 Days Saying It’s Broken?

Hi,

I just need advice cause I sold a laptop online through fb marketplace, I was selling it $900 dollars at first cause I just bought it last December 2023, and its been just 1 year in my possession and it is working properly. But no one is buying so i reduced it to $800. It is a gaming laptop. I sold it so I can buy macbook to bring to school cause gaming laptop is very heavy.

The buyer wanted it to be $700 but i told him it is pretty much cheap already as theres no issue to it so he agreed to $800 dollars and he picked it up immediately at my house after 20 of talking online.

After picking up, I gave them freebies as my form of saying thank you as well. Then 3 days later, he messaged me saying he wanted to refund it and that the laptop is broken. Which is really shocking cause it was working properly when I sold it to him.

He told me if I don’t refund he’s gonna sue me.

What should I do? I keep thinking about it cause they know my address as well. I blocked them already.