[If there's one thing Adrien understands, it's that you don't try to take an important object from a person. He has no idea what this guy's relation is to the hammer on his back, but if he's calling it his partner, it has to be important. Maybe even Miraculous level important. It warrants intervention, at least.

He walks over, offering the merchant a pleasant smile. ]

Hi there. I'm pretty sure he's not going to sell it, and he has given you more than your asking price. I'm sure we can be fair about this, right?