There have been some price changes for the books and tapes on the Lakhota dialect of Dakota available from the Colorado University Lakhota Project at the University of Colorado, Boulder, Colorado. They are, however, thoroughly usable. If you buy these through a bookstore the price may differ somewhat, since they will have to charge for postage, services, etc., on top of their cost for the book.
Customer is billed after shipping for postage and handling charges.
Any recommendation, express or implied, is my own, and does not reflect the views of my employers.