Just search for "paypal sent recorded chargeback" or similar you can see that it happens all the time, I'm glad I realised this before it happened to me. On a forum I visit a member got scammed out of over £1000 after consulting ome legal advice he concluded it wasn't worth his time chasing it. They will not listen and all you'll get is bailiffs at your door 6am every day until you give them the full amount (including their fees) or they find a way in and take their pick at your possessions.