I have a Dell Premier login so I can configure machines for our company, and send the e-quote to our purchasing rep. Dell lists a bunch of "standard configurations" on the first page. If I choose an Optiplex GX 520 MT and configure it, for example, it costs more than if I go under Systems and choose the Optiplex GX 520 MT there.
Some comparisons ... moving from the 40GB SATA hard drive to an 80GB SATA II hard drive costs $16.15, and changing to an optical mouse costs $11.90 on the standard configuration GX 520. If I do the same by going under Systems, the hard drive upgrade costs $11.25 and the mouse upgrade costs $10.50.
Shenanigans is right!