Question

Hi guys so I have a question. I have an eBay buyer who brought one of my old games for 100 dollars in a bid. He then said he would pay me an additional $400 for apple gift cards, 20 for gas and 30 for shipping and wants it included in the shipping with the game. He claims this is for his cousin’s birthday. Does this sound legit or a scam? He did not send me any suspicious links, no weird email address, and weird grammar

very sus