To an apple-woman's stall

Once some children nimbly ran;
Longing much to purchase all,
They with joyous haste began
Snatching up the piles there raised,
While with eager eyes they gazed
On the rosy fruit so nice;
But when they found out the price,
Down they threw the whole they'd got,
Just as if they were red hot.


*

The man who gratis will his goods supply
Will never find a lack of folks to buy!

Johann Wolfgang von Goethe

http://www.poemhunter.com/poem/the-buyers-2/