While you will be better off saving money to shop for quality pants (price per wear is actually lower for the quiet luxury pants than for pants you get for under $100 as the quiet luxury pants stay the same for years, while fast fashion pants look worn out before you even get to the cash register) you can shop for some affordable pants at Shopbop, Revolve, Nordstrom, H&M, Mango (faux leather pants from H&M and Mango are quite durable), and &OtherStories.