I know everyone wants a discount, especially in these economic times. But there's a lot of things dealers do 'for free' -
My local Naim/Linn/Rega dealer delivers and installs everything they sell. They set it up in your home and make sure everything is set up right - including stuff they didn't sell you - to make sure you get the most from your gear.
My Rega Apollo is having some issues and needs to go back to the distributor (this is becoming a trend for me lately). They called the distributor, got the RA#, made sure it was packed right, and shipped it for me. Others have given me a phone number and walked away.
When I bought my phono cartridge, they set up a few different carts on my turntable for me to hear them. They offered to come to my house, but I refused. The cart wasn't enough money IMO to justify them coming. They encouraged me to bring in my B60 and speakers (they sell neither) so I'd get a better sense of how the final result will sound.
I've never asked them for a discount. I pay full price, and they give me full service. When I asked them how much it would cost to set up the various carts on my turntable, they responded by saying 'Its built into the price.'
If a dealer didn't have the gear to demo, won't take it back for a full refund if I don't like it, and basically just took an order and my money, then I'd expect a little discount. If its someone who I won't see again, and they don't care if they see me again either, I have no problems asking for a discount.
I'm sure people will disagree.