As a knife collector, I have Never asked a maker for a discount off the price marked on the knife. I don't want to haggle over a hand made piece of art. The makers price is either reasonable and fair at the marked price, or it's not. I have had makers offer me discounts before, trying to make a sell. But that is Not my intent.
I think Ed and George have the right idea. They need to get a price that reflects their time, experience, and knowledge. I think it must be very hard to sell custom knives. I am reminded of a story about the artist, Gauguin, who was short of money and needed to sell a painting. He had refused a very nice offer. When asked why, he said something to the effect that 'if I sold him the painting, I would Only have his money. And He would have my painting.'
Bob's point about offering customers a discount on future knife purchases makes some sense, but customers that think they deserve or Need a discount on a custom knife are silly. Since they are not mass produced, and the price is determined by many many factors like the quality of work, the style of the knife, the materials used, and the reputation and credentials of the maker, I think haggeling over the price is an insult to the maker.
The price as marked either makes sense to me for a particular knife, or it does not. If I walk away from the table, and the maker offers me a reduced price trying to make the sell, I Might come back. But at that point, the absolute cost of the knife is irrelevant to me. I either want it or I don't.
The general price range is an important consideration for me when buying knives. I need to budget my funds just like almost everyone else. But the exact price is pretty low on my list of important factors in choosing whether or not to buy a knife.
Paracelsus