I've been trying to buy 4 for the last 5 hours but the price is always updated to $19.99 at the cart. I am logged in, is there any trick to get the sale price?
too bad, I started trying just a couple hours after the OP, the price shown was still $8.57 for a few hours, but at the cart it was always "updated" to $19.99 Beter luck for me next time... thanks for answering.