Some things you might value at zero dollars, or negatively. That clunky thing that's taking up needed space: set a reserve price of $0 and hope somebody takes it away for free.
Let's then parse this TradeMe listing:
Replete with intermediate level Economics knowledge, this degree will help you realise that the reserve price and the marginal utility gained by the seller are worth exactly the same!The seller is auctioning off his Bachelor of Commerce in Management, earned at the University of Canterbury.
I hope the seller means that he or she values the degree certificate at the $1 reserve price: owning the degree certificate provides its current owner with utility worth $1, and losing the certificate would make its owner $1 worse off. And so the reserve price is equal to the utility the degree certificate provides.
If the seller meant instead that he or she would gain marginal utility worth $1 by achieving the reserve bid, that can only be true if the value of owning the certificate were $0. That's plausible from the rest of the text, but hardly clear.
I've copied the whole ad below. I'm considering bidding. Then at Faculty meetings, we can truly state that at least one member of the Economics department owns a Management degree. If it ever comes up.