This definitely isn't the sort of talk Bigby is used to dealing with either. It's why he's quiet for a moment, like the guy just doesn't have any snappy reply to it, before he slowly says: "Thanks."

It sounds a little awkward, but it's exactly the awkwardness that makes it not sound fake. Like Bigby just genuinely feels a touch awkward about it, but is saying it anyway.

"You mind helping me out with the door now? I don't want to hold you up here all day. I can come help out with that roof after." It's not like he's going to make Raylan do something and then do nothing in return, alright.