There are some obvious reasons to rope (or perhaps more aptly, chain) Han into something like this. Even the Captain himself knows that. A certain side of him can't even be mad about it really. This is the way the underworld works and he is a part of it.

"You know ..." He says after a moment, sinking back in the chair. "You seem like a connected guy or the kind of guy that could make certain connections if he needed to. How realistic do you think it would be for you to find someone Malistarian Fuel and Corellian parts for a YT-1300?"

"I'd make you a list of what I need and feel better making an exchange with someone like you that I already trust." Trust enough not to completely rip him off, anyway.