You don't have to spend a lot to look great. You know that. But you might not be aware that there are a handful of sales happening at the moment, which means you can upgrade your pants rotation without having to part with much cash. Some of our favorite and most reliable brands are offering office-appropriate trousers, relaxed chinos and workwear pants—most for under a 100 bucks. But sizes and colors are moving fast, so you'd better buy now.