Are you looking for a dirt cheap, but still nice foundation? I'd like to recommend Jane's Stay Calm foundation to anyone who has oily-combo skin.
The shades? Just so good. It has yellow undertone and thus you can find your shade without great difficulty.
If you are between this and this? Just buy two shades and mix. Then you can make the exact match for your skin. (Still just ~$6 for two cute bottles) It controls shine and oil. I definitely repurchase this foundation.