the problem with this is that brick and mortarstores usually seem more likely to honor mistakes of these kinds because they have to deal with the customer on the spot. If Dell can just not pick up the phone, it makes it a lot easier for them to ignore customer backlash. I know plenty of times that in a brick/mortar store that they had significant pricing discrepancies and the manager is very happy to quickly take down the sign and keep the customer happy by giving him the price that is promised. If you can't trust what is posted, why bother reading it?