Like so many things in life, you have to exercise common sense. In this case, you first see the price. $20 for a decent, brand-new laptop that sells for several hundred dollars anywhere else. Your common sense should be screaming at you, "IT'S A SCAM NITWIT!". Next, look at the seller information. The name is "llooooll" with zero feedback. Yeah, this must be legit. Are you really that gullible?