I charge $150 for my services. I typically meet with the couple a minimum of two times; first as a meet-and-greet and, second, to talk details regarding the ceremony. There may be more meetings after that to finalize the ceremony and to run through a rehearsal. To date I have never charged more than the flat fee. If I have to travel we can talk about those costs.
I know that there are often circumstances where a couple cannot afford my fee. Ada County has a list of judges who can do the ceremony and you can get that list when you acquire your wedding license. You will need to set up an appointment with the judge you choose and then the fee is generally from $35 – $50.