This is going to be a seriously long, but hopefully helpful post. Clearly, there are tons of people who attempt to buy MAC cosmetics from eBay. This is a mistake. Yea, there are sellers who sell authentic MAC, but that's like trying to find a needle in a haystack. Once upon a time, it was actually safer to buy MAC items from eBay…it wasn't as easy as it is now to buy a total fake. It happened, but not as frequently as it does now. In fact, nowadays you're 10x's more likely to purchase a counterfeit item, than a real one. If I could physically show you what's wrong with the fakes on eBay, I would. But I'm going to try my best to explain to you what to look for. Don't get me wrong, eBay isn't the only place to get fake MAC makeup. Sites such as iOffer, Brush111, BombshellBargains (which sells both real and fake items), StrawberryNET, etc. have all been busted for selling inauthentic MAC items. One of the main problems is that it has gotten progressively harder to tell what is fake and what's real.