Is a resume-writing service worth it?

I’m debating pulling the trigger on hiring a resume-writer.

I have been searching and applying for jobs for the past 15 months with almost no success. I have only had a handful of real interviews. I have re-written my resumes and cover letters several times. I have sent my resumes to well-intentioned friends who have returned them in worse shape then I sent them, and even to a hiring manager who was kind but didn’t have enough time to focus on the resume.

I am looking for entry-level jobs which are, frankly, insanely competitive.

At this point I’m wondering if it’s time to hire a professional?

Has anyone else out there had success with this? Or vice versa?