Skull shop story

Long time ago, somewhere, far from all the traffic routes, in the place where all the fairy tales began, lived one man who held a shop with human skulls. Because of the distance, people would rarely go to his store.

Only once or twice a year, some unlucky traveler, most often someone who would get lost or fell asleep would enter that strange shop and stay astonished by the look of shelves full of beautifully arranged human skulls; one to the other, white and tidy, neatly arranged in lines.
Only after passing through the door you could see the semicircular room - unexpectedly - because the house looked outward like all the other houses - angular.
Astonished, more with himself entering such a shop than with a not-so-old gray haired man who stood by the handle, he would say, "What is this, for God's sake?" "The skull shop," the satin man would have answered laconically.

Accepting the frightening response, as if he heard the most normal thing in the world, the man would continue: "Well, how much do they cost?" "These on the left - one copper coin, this on the right - one silver coin and these behind my back are free, would respond the salesman only increasing the confusion with the unlucky customer who had not had time yet to repent that he even entered this strange place. "Why are their prices so different; look all the same? "he asked.

"These ones that cost one silver coin, they adopted and accepted every well-meaning advice that they would hear, they took knowledge wherever they would find it-not thinking of from whom that useful knowledge came-knowing that that was their lost asset, advised themselves with better off themselves and applied everything they could learn........ inside them stayed everything that they've ever heard and learned.
Those that cost one copper coin, they would hear a bit of what they should listen to, they would remember a little and applied even less; while their heads (before they became a skulls) thought they were the smartest in the world, and every good-natured advice was percepted as an open hostility for them, and they only advised with worse then themselves....... inside them remained of what they have learned.
These that are free, and while they were heads, they only served for decoration. They did not hear anything, nor they remember anything or asked anything ever, only thing that they were bothered was how they look like!. "

If this meaningless story from the beginning had a continuation it should carry a strong message. If the unfortunate, lost traveler, eventually would have asked while going out of "Hey, do you have skulls that cost one golden coin?"
"Yes we have them!" he would hear the answer, ''but they were never on sale!"