Adding knobs or handles to cabinets, or replacing the existing hardware, is an easy way to add your own style to the kitchen. You'll be surprised at the impact the change will make, especially considering how little time, effort, and expense this project takes. When it comes to selecting kitchen cabinet hardware, for example, you can spring for "tidier" options. Knobs and long pulls are nice, but they aren't necessary; even a traditional kitchen can do without them. 
Price depends on quantity