The cost of a CPA depends on your taxes. Typically, CPAs charge an hourly rate, so if you have all your paperwork and your taxes are relatively simple, it doesn't take much time. However, if you have a complicated return, it can take much more time.
We realize this is fairly nebulous, so if you're interested in hiring a CPA or want to know if your situation qualifies getting a CPA, you can always reach out to prospective firms and request rates and estimates.