Negotiating an offer, is it too late? (update)

I received an offer as a quality inspector and I think the pay is a little low. It has been a long 23 weeks. The hiring manager was friendly and open.

I thanked them and said I was excited but hoped we could talk about the pay. They came back with a bit more.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.