Always negotiate. This is a business transaction. They want you as cheap as possible. If you are confident in your skills, show them that by doing research into what your job typically pays in your area and asking for a fair wage. If you allow them to get you cheap, you're showing them you don't have confidence or value your skills.
This is a healthy way of looking at it. Good point.
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This is a healthy way of looking at it. Good point.