What I don't understand is why they don't rig their system to automatically hide the "buy" button whenever they change the price on something. They can then take a couple of minutes to click through their price changes, make sure they applied correctly, and then click another button or two to restore the "buy" button. Or, you know, take the entire site down for five minutes every night, put up a "we're changing our sales -- please be patient!" message, and then restore the site once you've checked to make sure there are no major price errors that will bankrupt the company. I'm sure something like this isn't THAT easy to set up, but until they figure out why their system seems to mess up every day, it might be worth the added effort...