Today, there is no option for ordering a new Dell without a keyboard. For a long-standing customer who is replacing a desktop to get the latest level of performance and already has a Dell wireless keyboard and mouse, there should be options for "no keyboard" and "no mouse" just as there is one for "no monitor".
Right now, your website offers me a ship date of August 16 for an XPS 8500 with a standard keyboard and a ship date of July 23 for an identically configured XPS 8500 with a wireless keyboard and mouse ($40.00 more).
It appears that the standard keyboard is causing a delay.
I would gladly accept an option of "no keyboard" just to get it quicker. Sounds like a "win-win" to me.