The image of a cheese for sale on the black market is really amusing to me. Just the thought of someone in a raincoat going into some dive, and handing over a slip saying "cheese please" to the arms/drugs dealer behind the counter....

Just think of some dodgy geezer in a long coat opening it to reveal two columns of pockets containing rounds and asking, want some nice cheddar with maggots? got some new Wensleydale in too, lots of wevils....