Best drugstore foundation?

The best drugstore foundation I've used so far is Maybelline 24hr Superstay foundation. You can find it for under $15. It's a liquid foundation and it has moderate coverage, but it's buildable. I personally have oily, uneven skin tone and acne scars and I find that this actually covers it and still manages to look natural. I haven't really had a problem with it flaking or anything even if I sweat with this on, not to mention I don't set it with powder so the staying power is quite good. It also has quite a variety of colours so you should be able to find a match with your skin. This can also decrease the darkness of undereye circles, but not completely cover them, so it looks more natural.