Can you sell other brands on your own website without wholesale? -

Ok so I have a website where I sell things that are my own brand... but I was wondering if you can take an item from say a big brand like for example Forever21, Edhardy , Nyx cosmetics ect. and sell them on your site as long as their authentic and you dont repersent them as your brand but as what they are if you dont have a wholesale deal with that company you just buy it from other stores and re sale?

You are OK, just represent accurately what you are selling