I need supplier for Playstation Network $10 Cards (USA)

My name is Morteza and I am a retailer.

I’m looking for a trusted seller who can provide $10 PSN codes with 15~20% discounted wholesale price.

I need about 50 codes per week for make small deal first and i will only deal through Gameflip platform and the codes should have long validity (minimum 2 months)

Who can help me?