I'm not sure about your preference/wardrobe needs (are you a jeans person or dresses/skirts/etc?)
Jeans - Jeggings are an excellent option
Dresses/skirts - Body con stuff will work the same way
As other people mentioned, Forever 21, H&M, places like that will give you the trendy pieces without the heavy price tags. Also try clearance stuff online like Macy's, Nordstroms, and Express...
Target has quality stuff that is relatively inexpensive too...
I totally understand where you're coming from. I hit my 100lb lost mark this past weekend... the loss was over the last 2yrs. I cannot tell you how much money I've wasted on clothing while downsizing...