Is expensive products better? You get what you pay for.
You can't save on a good oil. Oils in particular, in pure natural form, are very expensive. Some oils are rare, because they are not continuously sufficient, and it takes very intensive (manual) work to make the oil.
Is an oil sold for a bargain? Then the alarm bells should ring.
Oil helps to prevent moisture loss. It makes the skin soft & smooth. A facial oil can work wonders for any skin type, as long as you choose the right oil for your skin.
Natural oils are easily and completely absorbed by your skin, because the structure of the fatty acids corresponds to that of the skin. Test the oil with a few drops on your skin. A good natural oil should absorb fairly quickly without leaving a greasy feel or residue. If a greasy haze remains, then you certainly do not want to purchase this oil.