How much room is there after an offer? after 5 years as a welding apprentice

I received an offer as a welding apprentice and I think the pay is a little low. I have read a lot of threads here and could not find my exact situation. The hiring manager was friendly and open. What wording worked?

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.