JobPosting currently has baseSalary but it would be advantagous to have also an estimated salary property as well—when such an estimate is provided by sources outside of the organization offering the job posting.

estimatedSalary: A property describing the estimated salary for the job posting based on a variety of variables including, but not limited to industry, job title, and location. The estimated salary is usually computed by outside organizations and therefore the hiring organization is not bound to this estimated salary.

Expected types should be similar for that of baseSalary: MonetaryAmount, Number, or
PriceSpecification