Sell publicly and buy privately.
More Spanish Proverbs:
Nae man can baith sup an' blaw thegither.Spanish
If you want to beat a dog, say he eat your iron.
Spanish
To offer friendship to one who is looking for love, is like giving bread to someone dying of thirst.
Spanish
There is no lock, if the pick is of gold.
Spanish
A blind man's stroke, which raises a dust from beneath water.
Spanish
Women, melons, and cheese are bought by the weight.
Spanish