Someone messaged me on YouTube about selling a MacBook Pro. It's an early 2011, 15 inch model. I offered him $500, and he said he'd take it. I just find this unfathomable. He wants me to pay him with a Best Buy gift card, because he doesn't have a PayPal, and my money's in cash. Is this legit? Should I trust this guy and buy the MacBook? He's going to send me some pictures of the MacBook with a piece of paper that has his username on it, so I can see if it's the real deal.