As a lawyer I’ll give you the ultimate and best tip (which you may ignore but I’ll give it anyway)...
Read the PayPal terms and conditions. Why am I suggesting this? Because when the deal goes south that is the only thing that counts. You’ll be reading them and wondering why you took the advice of random pinsiders.
I’m not being sarcastic in any way. Read the terms.
Don’t feel like reading them? Don’t use PayPal for this. Trust me.