The world’s foremost dermatologists, makeup artists, and hair stylists can all agree that it’s simply a fallacy that the best beauty products need to cost hundreds of dollars. Of course, sometimes a pricey skin care product is absolutely worth it — and sometimes a cheap product does indeed reflect its price tag. In the end, it’s all about doing your research, testing a ton, and listening to the experts who know what’s up. To avoid disappointment, consider this article your guide: I’ve already done the heavy lifting for you, and I can proudly say that, even I, a self-proclaimed beauty snob, am obsessed with these cheap beauty products that work…