Offer arrived, can I still ask for more? after 13 years as a school bus driver

I received an offer as a school bus driver and I think the pay is a little low. Any experience at all would help. I have a competing interview next week. Did it backfire?

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

If they say no, consider asking for something else, such as a review in six months.