I get that you wanna have a rough idea what’s fair and what’s a rip off but honestly its too tough to answer that question over the internet.
Prices vary greatly in different regions. The legally required licenses and insurances vary city to city and state to state, which is a big factor in price. Some areas would legally require an inspection for such work (more cost to you). I’d be quite annoyed if I gave someone a quote to a job right, charging a fair price and doing the job the way its legally required to be done (weather I agree with the regulations or not) and the homeowner came back with “well this anonymous guy on the internet said its a 5 min job that uses $25 worth of materials so no way I should have to pay more than $150 for it!!!” You are really just gonna have to bite the bullet and call some local contractors and see what they tell you.
I’d trust more the advise of people who give off the impression that they actually have done the physical part of constriction as opposed to the smooth talking salesmen type without a spec of dirt on their cloths who can’t wait to tell you whatever you wanna hear to get you to give them the job.