They look delicious, as they're being eaten right in front of him. It's rather rude to taunt him like this, but it would be ruder still to ask the man to share... as much as he might wish to do so.

So when the man offers to make a bargain instead, D can't hide the interest in his expression. "What sort of bargain did you have in mind?" Is it money you want, sir? He's clearly got tons, judging by the way he's dressed.