Sams club does deceptive sales. Every time there is a free tire installation sale. The app will let me put this item in my cart, show me the sale price, but when I go to check out it dissappear from cart with a message saying it's out of stock. Then the day after the sale is over... it will let me check out. This is now the second sale that these have went on and this occurs. I go to the store and the tires department has no training and will not help. Why are you showing it instead but not allowing me to pay for it at sale price? But if I pick a much more expensive modle you will let me check out? Very deceptive and unfair marketing technique to give an impression of a sale but not honor the sale.