Was scammed 50$ from someone who I was trying to buy an online account from.

[editesilvax]

Alright, I sent 50$ to this person who I spoke to for a while in order to buy his online account from a browser game. Literally 5 seconds upon sending payment, he blocks me...What can I do?

[CalebJKim]

Did you send the payment as a goods and services payment or as a friends and family payment?

If it's a family and friends payment and you paid with your paypal balance, you can try phoning Paypal, but out of experience, they won't do anything. 

If it's a friends and family payment and you paid with credit/debit card, call your card issuer. You can open a dispute with them.

If it was a goods and services payment, call Paypal and open a dispute with them. 

Let me know if you need more specific help.