This is a typical payment method used by scammers, since if you choose the option to pay a family/friend, then PayPal takes no responsibility about the security of the payment, and will not be able to reverse any charges. The other payment options given by the scammers - cryptocurrency - is again similarly unrefundable. If a seller's first preference of payment via cryptocurrency (bitcoin, ethereum etc) or PayPal, it is a clear as day red flag. don't go near such seller with a 10ft barge pole even
Edit: PayPal is known for being used for scamming in the US, guess people here don't know much about it :/