Steve,
Pricing and what it includes varies from contractor to contractor / state to state
Some charge for stain separately because sales tax has to be collected.
Charges vary with the degree of difficulty of the job, the PITA factor of the height/plants/terrain, the demographics of the country, the level of expertise of the company.
You cannot learn to price wood restoration on the web. It might be helpful but it is definitely NOT a reliable measure. You have to know the wood, the seemingly endless variety of coatings to be removed and/or applied, the chemicals required for each type of coating to be removed or maintained. You have to know what your area will bear as far as the rate you charge - you also have to be very aware of the time required to achieve the results that meet your standards, what the products will cost and make sure that you have achieved your net profit at the end.
The net is a great place to find out what others at your experience level charge - what products they are using successfully. Even better if you can find someone relatively close to you who might share.
Celeste