I know your not meant to keep your foundation after a certain time and I have broken that rule. I bought my Chanel Vitalimiere Aqua at least a year and a half ago and I love it. I used to think that full coverage foundations where the way to go, but I've been proven wrong. Massively wrong. I am wrong most of the time, but I don't like to admit it.
The Chanel foundation is £31 and I mean it's Chanel so your paying for the brands name mostly, but the foundation it self is amazing. Having dry skin isn't the best thing I have to deal with. This foundation is water based and it works miracles for me. No sticking or clinging. Hallelujah. Literally my prays have been answered for the perfect foundation. The coverage is very sheer, but it's certainly buildable and you can achieve a medium coverage easily, you don't need that much either.
I would so so so so you get the jist recommended this to anyone with dry skin. Literally I would goals far as calling it my foundation saviour. Although I don't wear foundation anyway, I have been using little bit of this on areas where needed. Perfecto.