Who Wants to Sell a Soul?

In the comments section for a Q&A with professional skeptic Michael Shermer, a reader named Caleb B. writes:

Here’s my question: what is it about the idea of a soul that even people who confess to not have one are hesitant to sell it? I have been trying, for the better part of ten years, to buy a soul. I’ve offered a dollar amount, between $10 and $50, for someone to sign a sheet of paper that says that I own their soul. Despite multiple debates with confessed atheists, no one has signed the contract. I have been able to buy several people’s Sense of Humor and one guy’s Dignity, but no souls. Additionally, will any Freakonomics reader take me up on this? I’m willing to spend $50 on souls.

He has so far received at least one offer, from reader Jared Doom:

Caleb B., I will absolutely sell you my soul. To be fair, this won’t preclude me from selling it again to other suckers who (a) believe in souls and (b) believe they can be readily transferred on purchase. To be clear I’m offering because I don’t believe (a)

If nothing else, perhaps this blog has a future as a market for hard-to-purchase goods?