Hair extensions can range in cost from rather pricey to wallet-friendly, depending on the type and quality of the extensions. Generally speaking, real human hair extensions tend to be more expensive as they can generally last longer and style better than synthetic hair, but there are great synthetic extension options that don't break the bank. Ultimately, it really comes down to your desired look and lifestyle; if you are looking for something more permanent or higher quality then real human hair extensions might be worth the investment, but if you simply want a fun and temporary way to switch up your look then there are great synthetic options.