There are several places to buy hair extensions online. However, it is important to first determine the length, color and type of extensions that you want before buying them.
Research the types of extensions and figure out which kind will work for your hair type and the look you want. You should also consider and compare prices of extensions on different websites, as they can become rather expensive the better quality you buy. Places like eBay, Sally Beauty Supply, and Overstock all sell hair extensions online, but be sure to research what you are buying before pressing the purchase button.