High authority backlinks originate from websites that have established a considerable domain authority and a robust online reputation. These websites are often viewed as trustworthy and credible sources of information. As a result, any backlink from them can immensely benefit the SEO performance of the linked site. Given the potent SEO advantage these links provide, they are naturally in higher demand. Consequently, their perceived value is greater, making it more expensive to buy high PR dofollow backlinks.