1. unless your using verified paypals, recieving more than 300usd in an un-verified account will get it flagged, then when you try to spend it, the account will become limited.
2. most gold sites are slow (2+ hours) and require phone verification. and ontop of that most WILL NOT have a great deal of gold in stock, so the bigger the number of gold, the longer the wait.
3. closed paypal accounts can and will be disputed if necessary, if your name is on the account then your screwed, if not then your fine dont worry about it.