Lots of advice here, thought I would add some more.
Never send to a different address to that registered with PayPal. If you do PayPal will not protect you.
The buyer can get his money back even after it's paid. What happens us.....
Buyer sets up PayPal to take money out of a bank account. Pays you. PayPal transfers money to you and AT THE SAME TIME requests money from buyers bank.
Time passes - normally 2 or 3 days
Paypal's request to bank fails for whatever reason - usually no funds.
PayPal then "re-wind" transaction and take money back from you, no questions asked.
If you send item in that 2 or 3 days you loose it.
So don't send item until PayPal transaction is fully confirmed.
Sent from my HTC One X using Rib.net