There are many threads here that have brought this up. Pick through them and you will find some discussions on price and even some stating what they charge.
There is a rule in photography about prices. It states that "One should never charge based on what others charge. Charge based on what it costs YOU to do the job and add what YOU think you are worth."
This rule is a bit tricky because you can't really follow it to the letter. It is more of a guide.
The first thing I would do is find out what your competitors are charging. This will give you a basis of what the "market" is used to paying.
Second evaluate the quality of the work and the features they are giving in their tours. Are they including still photo galleries, floor plans, text descriptions. How fancy is their presentation? These features add value to the product. The more they offer the higher the price usually is. And the MORE TIME IT TAKES you.
Consider things like your service area. Will you have to drive far to get jobs. Can you find jobs within your local area or not.
Who will you be targeting.....real estate, vacation rentals, entertainment venues, or corporate companies.
How much did your equipment and software cost. How long will it take you to recover this cost. If you paid $8000 for a canon 5D this should way into how you charge. Better equipment usually means better product once you learn how to properly use it that is.
Real estate is the absolute bottom of the market in price. You will find it is hard to make any real profit in this market. Especially if you have competitors.
I have competitors call me all the time acting like clients trying to find out my price list. Do the same to them. I hate that.....but hey its a free market place.
Most of the time newcomers to pano work are willing to charge anyting to get the job. Even if this price is rediculously low. If you have been working in a kitchen washing dishes for 8 bucks an hour doing pano work for $15 an hour sounds like a dream......so you will have to deal with that
So figure up all the costs involved. Look at your market and what competitors are charging. Ask yourself what you want to make either per hour or yearly. Consider what you will have to charge to "penetrate" the market and get a few jobs. Keep track of your shoot and production time on a time sheet. This is important!!!!!!!!!!!! IF you don't know how long it takes you to produce a job how will you know how much to charge?
In the beggining you will have a large learning curve and it will harder for you to make the same profit established competitors are making. If you undervalue your services in the beggining it is ok. But as you get better and your product gets better so should your price.
Eventually if you work hard enough and have a good business sense and keep track of the market and your competitors you will establish your self in a certain part of it. Once this happens you can begin to see the light.