Like Celeste said it's kinda hard to give a price on restoring wood with many factors that come into play.
It has a lot to do with the kind of stain/price of the stain you are paying etc.How much labor you have or expenses on chems,gas etc.
I like to charge seperate for cleaning less for new wood and price according for stripping or large jobs.Oh and large jobs are not always cheaper cause more wood = more work.Sqft for decks, Lft for handrail.Now for fences i calculate my sqft price to a Lft price for 6'5" and 8'5" tall W/top cap on fences are more$$.
You are welcome to call me also if you need some ideas.I've been cleaning and staining wood for the last 10 years here in Houston...713-203-1648
Wood Savers of Texas
"We Beat the Weathering Problem"