I sold/am selling my drugstore-brand stuff on a local site, but I'm keeping the pricier ones (NARS, MAC, Smashbox, T.LeClerc, etc.) because I've spent so much time and money on them.
I've mostly stopped using traditional foundation (MMU has better color matches) for daily use, except for the occasional liquid for dressier occasions, but I still always use traditional eyeshadows, blush, lip products, bronzers and highlighters.