You should always pay someone for their services.
Jackie has some computer trouble and asks her nephew Bobby to fix her computer for her, so she can finish her work project.
Jackie needs to have her computer fixed enough for her to finish a work project.
Jackie asks Bobby to fix her computer and pays him the small fee that he asks for.
Jackie asks Bobby to help fix her computer but says no when he asks for payment, causing Bobby to rush through the repairs.
Jackie's computer is fixed, and she is able to continue using it for her work projects.
Jackie's computer works long enough to finish her project but breaks after, and she has to spend $200 to have her problem fixed.