Go on the Alaplaya-site. Then go on "Buy AP". Then search the button with "Paysafecard". Take the price. And last but not least write the code into the lines.
I'm sorry that i can't speak italian but i hope english would help you.
io non sò parlare l'inglese perciò scrivo italiano, ma non non ti preoccupare ho capito tutto, ma quello che voglio sapere è come scambiare gli account del black market con soldi psc. comprendi ?
At the black market?
Then search a Thread with a Acc or a Service. And ask the Thread-wirter with a PN. And use english words because its easyer to understand for the most.