Designer-specific compensation is the subject of O’Reilly’s Design Salary Survey (http://www.oreilly.com/design/free/2016-design-salary-survey-report.csp) and Coroflot’s Design Salary Guide (http://www.coroflot.com/designsalaryguide). Candidates are likely talking to multiple companies, and will probably receive multiple offers. Being cheap demonstrates a lack of commitment and investment in design, and a sure way to have a candidate turn down the offer.