The myth: Somewhere, out there, you can get relatively expensive name-brand products for really cheap.
You've probably seen these posts around Pinterest: "Cheap MAC! Where has this been all my life?!" "Urban Decay Naked Palette only $12.00! My life is complete!"
The Reality: You're getting knock-offs. Like a knock-off purse these products are cheaply made and likely won't be anywhere near good-quality.
My take on this issue? You have no idea what's going into these knock-off products. Go for a reputable dupe for name brands if you can't afford the real thing. You can find them all over the place. Or opt for products from NYX, Wet n' Wild, e.l.f., and NYC. Mix and match the best from these brands and you're likely to have a great beauty bag!