Are you be able to read words or just move your fingers on keyboard?
I said this if you can read:
If someone wants to buy GC's and pay the face value in BTC,There is many trusted Sellers (Like Gyft.com ) that can be used.
Do you know there is many GC providers that accept BTC and also sell with discount? Do you know Purse.io? Do you know everyone can buy physical & digital goods from Amazon in Purse.io with btc and also in discount ( While you sell just $10 PSN)?
Do you know LBC?
https://localbitcoins.com/sell-bitcoins-online/us/united-states/c/gift-card/Do you know you just know nothing?
Now tell me why should someone deal with an unknown person with high risk and pay more than face value for just $10?
Can you prove you are amazon worker? can you prove your amazon balance is really from amazon? why you just sell $10s? why you don't sell other amount? why you don't think before posting answer?