We use merisms often in sales, auctions and marketing. According to Wikipedia "Lock, stock, and barrel is a merism (figure of speech) used predominantly in the United Kingdom and North America, meaning 'all', 'total', 'everything'. The effective portions of a gun (or more specifically a musket) are the lock (used to hold ready the sparking mechanism), the stock (the portion held), and the barrel (the aiming guide and conveyor for the explosive-driven projectile). Collectively they are the whole weapon, and therefore everything."
When we met with our client, Herbert Waynick, he said sell everything, lock, stock & barrel. Listen to Herbert