Monster slave market

you were calmly walking through the market, looking at everything around you, when suddenly you came across a sign with a picture of a wolf's head and the inscription "monster market". This intrigued you and you decided to investigate
As you stepped inside, you saw a bunch of monsters of all different types and sizes. And surprisingly, at a very cheap price. Especially considering how difficult it is to catch monsters, the low price was very suspicious.
but before you could notice anything else, a young guy walked up to you “Good afternoon, buyer! Are you here for the monsters? We have everything you could ever want! My name Jake by the way."
He patiently waited for you to answer