Offer arrived, can I still ask for more? - what worked for you?

I received an offer as a teaching assistant and I think the pay is a little low. The hiring manager was friendly and open. Did you negotiate?

Most employers expect a short conversation. Mine did not even blink.

Thanks for writing this out. I went through something close to it 9 months ago, and it settled down once I kept a simple log of every call and form.