Kaj_Sotala comments on Bargaining and Auctions - Less Wrong

29 Post author: Yvain 15 July 2012 05:01PM

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Comment author: Kaj_Sotala 15 July 2012 05:30:56PM 18 points [-]

Suppose an antique dealer buys a table for $50, and I go to the antique store and fall in love with it, believing it will add $400 worth of classiness to my room. The dealer should never sell for less than $50

Isn't this the sunk cost fallacy? What the dealer originally paid for the table is irrelevant: what's relevant is the price that he can get for it. If he himself has no other use for it, then he should sell it for the best price he can get, even if he made a mistake in estimating its worth and it turns out that nobody's willing to pay $50 for it.

Comment author: AnthonyC 17 July 2012 12:37:40AM 2 points [-]

I think it might be important here that the dealer has to do this many times. Yes, sometimes he will need to take a loss on an item to free up inventory space. But for any particular item, if it doesn't sell it is more likely that the right buyer just wasn't present. If a dealer consistently follows the policy of ignoring his purchase cost, the result is that he goes out of business.

Comment author: DSimon 17 July 2012 01:11:04AM 3 points [-]

No, I don't think this makes sense. The dealer's opportunity to care about how much they paid for the table passed when they bought it. After that, all that matters when it comes to price-setting is how much they think buyers will pay, and any costs related to keeping it stocked

Comment author: drethelin 19 July 2012 05:59:19AM 2 points [-]

It's really hard to know how much any random person will value a given antique, considering the uniqueness of antiques and people. It's really easy to know how much you paid for a given antique. As a heuristic to keep in mind while bargaining "Always sell for more than what you bought for" seems like it would be helpful, even if in the abstract it doesn't seem like it should be important information.

Comment author: DanielLC 18 July 2012 08:07:07PM 0 points [-]

If the dealer has other people he could sell it to, it's an auction, not a bargain.