I'm a fan of the gig economy but there are problems. People starting out as professional writers frequently use sites such as Airtasker. They're cheap.
The reason they only charge $50.00 for a resume is they lack qualifications and experience. If you want a $50.00 resume, that's what you'll get.
In Australia, resume fees start at about $120.00 for simple reformatting and restructuring. At Republic, the average cost for a resume is around $220.00 (a bit cheaper for students) and executive resumes start at around $300.00.
I use a drafting system where we focus strongly on quantification of results and new, saleable content.
That requires writing and rewriting and some buy-in from the client.
Creating a professional product creates time and finesse. The resume writer also needs to have an executive understanding of HR, workplace reporting functions and training (AQF). You won't get that from an Airtasker.
I reckon if you've only got $50.00, then have a crack at writing it yourself. That will be much better than putting your future in the hands of backyard operators.