A man knocks at the door of the guildhall.
“Excuse me sirs; I have information of substantial value to you. I would like to sell it to you, for a reasonable price.”
“As a gesture of good faith, I will give the first piece to you for free: this morning, a man left town on a fast horse, riding South, toward Murkshire.”
“The remainder of my information will cost 300 gp. I assure you, it is worth every penny to you.”