I think the difference in quantity you purchase in makes a big price difference. I know Carolina Customs posted they just received a container shipment of Balsa on Facebook.
worked as a part-time credit manager for a furniture company for some years and when the owner opened a second store in another town he was killing the long time local store in that town. He was selling the other store's bread & butter bedroom cheaper than they were buying it. He was buying container shipments and they were buying 2 or 3 at a time from the importer/wholesaler. They complained and wanted the importer to set a minimum retail price, but were told by the supplier it was illegal for them to force my employer to change pricing (Federal Anti-trust legislation). The importer did tell the local store they would get the same price if they ordered in the same quantities.