My brush collection is something that I have started to expand recently. Up until two years ago I had like 3 brushes: power brush, two eyeshadow brushes and some of the applicators I got with the eyeshadow quads.
My brush collection varies in price: there are expensive high-end brushes next to cheap drugstore one (and I don’t see much difference in quality).
I take care a lot for my brushes – the oldest one in my collection is 10 years old and it is still good as new (even better). I wash them once per week (depending on how much make-up I do that week) with gentle, no-silicone shampoo in lukewarm water.
Currently I have 4 face brushes (but looking to expand it), 11 eye-brushes (not counting the applicators I got with the eyeshadow palettes) and 1 lip-brush (don’t need more).