The only drugstore product that is even better than high-end one is mascara. Drugstore mascaras are not only cheaper, their formulation is very good and brushes made to perfection. The main reason for this is probably the fact that drugstore brands tend to test and launch new kinds of mascaras all the time, which is not surprising knowing that mascaras are one of their most selling products. Naturally, thanks to experimenting and testing eventually they create the perfect product. I am not truly a mascara person, meaning I don't go crazy with ten coats of five different mascaras. Still, I love a good mascara and these are some favourites I found over the years.
L'Oreal Paris Volume Million Lashes
There are couple of versions of Volume Million Lashes (Brown, Extra black, Waterproof, etc.) but I like the basic version the best. It has silicone brush (which is my favourite type of mascara brush) and great formula, it doesn't clump and stays on your lashes until you take it off. You can apply couple of layers of this and it will still look good.
L'Oreal Paris Mega Volume Collagene Black
Remember when I said I love silicone mascara brushes? Well, this one is wire and bristles type of brush (bristles are shaped to give you nice coat covering all the lashes) and I love it. Colour is super black, the darkest black you'll find in L'Oreal mascaras. My lashes look doll like and very long when I wear this mascara.
L'Oreal Paris False Lash Wings Black
Another one with silicone brush and formulation similar to Volume Million Lashes. The brush is perfect, a little bit angled so you get winged eyelashes.
L'Oreal Paris Mega volume Miss Manga Black
I promise this is the last one from L'Oreal! Another amazing mascara, you can read my whole review here.
Max Factor 2000 Calorie Black
The first mascara I feel in love with. It gives me amazing volume and very natural looking lashes.
Kiko Make up Milano Luxurious Lashes Maxi brush Mascara 
Not really a drugstore buy, but it's in that price range. Brush is quite big, but it's still easy to apply this mascara. It smells great and formulation is very light but pigmented. It's perfect for natural and 'no makeup' looks.
Maybelline One by one Volum' express Mascara Satin black
I have to admit I am not a fan of Maybelline mascaras. Everyone is raving about them but they dry on my lashes too fast and start to crumble in couple of hours. However this one works just fine, I didn't have any crumbling issues with it.