In 30 years behind the table I've had dozens of people not understand the prices, and I learned to not say 12 but twelve hundred, saves a lot of time. I even have stickers on the knives, and as late as last weekend a well dressed gentleman came up and pointed to a carved ivory knife with a $300 sticker. "I want to buy that knife." As I was opening the box I saw he was extending a $5.00 bill.
"Sir, the knife is $300.00," trying to be courteous. Maybe it was the huff that he exploded with and his stomping away as if I had insulted him that made me add, "You going to walk away on that? It's only $297.00 more!". He didn't come back.
Dealer Paul Davis once had a customer who made a counter offer about 50% off the prize Paul quoted. "That's ok," Paul said, "I'll just keep it till someone comes along with money."
When the man stopped gasping for air he shot back, "I have money!" before he walked away.
Dealer Lynn Watkins got the the point at a show with a countless parade of "I'll be back" dismissals that he started assigning numbers. When a show guest would say, "I'll be back," Lynn would answer, "Your be-back number is 23, please remember it so when you come back I can mark you off the list."
My favorite comes from Bob Loveless, who told me of a guy walking up to his table and asking, "What's that knife worth."
Bob, always quick the the blunt truth, said, "About $300.00".
The man was already reaching for his wallet and had it half out when Bob continued, "It is worth about $300 as a user, but I sell them for $1800.00." (Yes, it is an old story).
The one that always annoys me is the guy that says "Is that the best you can do?" so you quote the price, and he offers less. I never come off that price once he has asked that.
"You asked for my best price, you didn't want me to lie to you about that did you?"
"Well...." and they usually repeat the lowball.
I always smile and answer, "Thank you, but my integrity is worth more than that."