Dig out the Yellow phone book and call all the lumber suppliers in your area, I may have some here, but it won't do you any good.
I'm not sure what you mean by the question. A lot of our lumber is exported. Otherwise, most homes are built of lumber, plus all the commercial uses such as furniture, shingles, etc.
The idea of material suppliers giving wholesale or discounted prices has to do with perceived volume of business. If you are building a house, take the total material list to a couple of lumber yards for a bid on the total package. Most of the time, ...