I don't think I can help you much. My mom also doesn't think I need all of the stuff I have but I enjoy having a wide assortment and being able to have so much to choose from depending on what strikes me that day. The only items I'd get rid of are ones that don't work for me (if there is a certain colour or finish you hate) then I'd sell those. But for me, I wouldn't sell just because I have too much. A lot of this stuff can last quite a while (ie powders) so I don't worry about having a few palettes.