Those retail outlets were surely bleeding Gateway dry, at least the BestBuys and the Staples have other products to make a profit on, and can afford to have computers as loss leaders.
Another reason to like Dell is how easy it is to open their computers to open up and add or remove parts. You hardly need a screwdriver. It also takes less time which saves on support costs. My old dual Pentium Pro Micron Pro2 (upgraded to Pentium II Overdrives) has lots screws to remove just to open the case. It's even worse trying to get to the drive bays to to add or delete a drive.