"Can I have them?"

"For five more, maybe."

"All souls are equally interesting?"

"Nah, some of them are better than others, but I've had these for awhile."

"What makes one better?"

"Oh, ineffable this and that. Piquancy."

"...sounds like bullshit, honestly."

"I wouldn't expect anyone who wasn't a demon to understand."

"Can you tell whether someone has a soul?"

"Not till after they die. Got ripped off once."

"How can you tell when they die?"

"It's just obvious."

"So if I sold you my soul and then at some point in the next twenty-four hours committed suicide, you would be able to identify the moment when I died?"

"If I was paying attention."

"If you make me seventeen million dollars worth of stuff I'll do that."

"I'm not sure your soul is that good."

"It'd take you like twenty minutes, there's a listing for a couple massive space stations off my home planet that pays out that much."

"You just seem like you have a really boring soul."

"I think you're lying about anything happening when I die and don't want to get caught out."

"Whatcha gonna do about it?"

"Send you home and talk to someone else, I guess."

"You seem like your soul would be the most boring ever soul."

He sends him home and gets the next one.

Next one wants to get on a list and do islands.

"I can put you on a list for that, sure thing. Do people have souls?"