It depends on the purpose and grade of the lumber. I have worked an "exotic" lumber dealer that can definitely offer different species and grades of wood from

It depends on the purpose and grade of the lumber. I have worked an "exotic" lumber dealer that can definitely offer different species and grades of wood from all over the world -- including CITES (endangered species list) lumber with the proper certificates. But their customers are typically woodworkers that want a specific species for a specific look. So it's usually cabinet and furniture makers etc. I have also worked at a "discount" industrial lumber distributer. They are selling wood to be made into pallets or used at a construction site for bracing. In those cases, the hardwood species are a lot less important. The customer just needs something much stronger than the standard SPF. It's a fascinating industry. I learned a lot working that job -- even tho I was just implement their ERP systems.