Then offer to pay less. Sales people are annoying, but they can work to your advantage if you play ball.
There is no justification in having those sales people around. They have absolutely zero technical information that I need, they're just sitting on the price. I know that my interaction with them and their skill in ripping me off is paying their salary - but I want them gone. Send them home, they are completely unnecessary legacy cruft. They are costing companies like Dell real money in lost sales. A few days ago I was talking to a sysadmin friend of mine, he feels the same way. I know I'm not alone in this.
While we're talking about Dell and parasitic cruft, they should reconsider their mandatory commercial operating systems policy as well. It's nearly impossible to buy many of their servers without an OS already on them.
I have not had the same experience as you with Dell; we have an established "medium business" account and get pricing online that generally reflects our base discount. We can sometimes get more off by dealing with those salespeople (especially if it's near a quarter end), but in general we get a fair and predictable price, visible on the web site. Servers show up (sometimes later then I'd like) configured as ordered, and just need put into a rack and powered on.
Our "server specialist" certainly isn't the most technical guy in the world, but he knows the hardware line in and out, knows what works, and what other people are using for similar projects.
I regularly buy servers with no OS (if I'm reusing an old MS license), or with Redhat (my standard OS) at a price competitive with others.
I'm done defending Dell though; and don't think I'm arguing there is no room for improvement. At the very least, one's experience with Dell seems to vary wildly depending on account reps and established agreements and processes. There is no reason our experiences should be so different.
Very hard, because the other side of the transaction wants to sell stuff at a non-transparent and very high price.
Oh, BTW, you can get all your server needs on NewEgg by just clicking on the buy button. They even carry my favorite brand, Super Micro.
It felt a little risky spending so much money with a smaller company, but so far so good. I thought I was going to have a heart attack when of the $(five-figure) boxes was severely damaged in shipping, but they handled it beautifully and painlessly.