A bit of sad news: Prescriptives, which is owned by Estee Lauder, is being shut down at the end of the year. I have a number of products from prescriptives including their custom foundation. I know that many people love the custom service, as you're able to work with an artist to develop your perfect shade. I got matched a couple years ago and the shade is currently a little too light for me, but it was a perfect match at the time. They also have a good selection of eyeshadows and lipsticks to choose from. So if you want anything from Prescriptives, I'd head over to your local counter or online to pick up stuff before it goes away.
Right now, you can pick up some free goodies too with a foundation or skincare purchase of $32.50 or more. While you can't get the custom foundation online, the All Skins Mineral Makeup is a good mineral foundation.

