"For the right price, you'll get the most direct route."
The adventurers glanced at each other, then back at the map-selling imp, "And for the wrong price?"
The imp blinked, "You'd get a long and hazardous route."
"So what would that price be?"
"...Six coppers?"
"How long and hazardous?"
"Depends on when and whether you give up..?"
"Wrong price it is!"
Well that was one way to get rid of an out-dated product and still make some coin.