Walnut is one of the most expensive American woods. Teak is one of the most expensive international woods. Wood has become popular and is used in flooring.
well their are many types of expensive wood but my advice is if it is rare its expensive
agarwood
Sandalwood
Green treated
It costs about $300 per sheet
supply&demand
The most expensive American car was the Cadillac or Lincoln which sold for over $5,000.
Sunoco
Teak wood seems pretty expensive. It is valuable for its elegance and durability.It has a significant historical background. Teak wood has some natural properties that most other woods don't have.
Penn State
A shed can be made out of almost any wood. Most are softwoods so the most expensive will be well seasoned fine grained softwood. Of course, there is nothing to stop you building a shed with hardwood. It's slower growing so they are far more expensive than most softwoods. Lumber such as oak would be a fine choice as it needs no preservatives and will last for many years. It is unlikely that there will be a more hard wearing wood than oak so that is probably going to be the most expensive wood that is still a sensible choice.
Not necessarily, as it all depends on the type of wood you are interested in purchasing. Most "pine furniture" is very inexpensive, especially if the wood is unfinished on the surface.