Ok, so before the hate mail starts, let me throw in my two cents:

As a designer offering a service, I can relate to the situations in this video, as I am sure other business owners can as well. This video was brilliantly produced to help put the perspective of designers (well, it probably wasn't made just for designers, but really for any other industry with similar relationships) and their clients and the different conversations that take place. In particular, this video covers the pricing issue, where a handful of prospects like to try to get alot for a little, get stuff for free, or find out how they can do it so they don't have to pay for it next time. It helps the client understand where we (as in vendors of services or products) come from when we explain that we can't give stuff at a discounted rate, for free, or show them how to do it.

On the other side, it never hurts to ask for a discount or other things, because you might get a 'yes', but understand where the business owner comes from when they say 'no'.