Yes it might. That one item can swing the whole spectrum from "free on Craigslist" to "$14,950 OBO" depending on how motivated that one seller is, and how motiv

Yes it might. That one item can swing the whole spectrum from "free on Craigslist" to "$14,950 OBO" depending on how motivated that one seller is, and how motivated that one buyer. One way or the other, its price will have little correlation with how much it previously transacted for. The buyer might even be a knowledgeable antique appraiser who picks it up for free and flips it for $15k the next day. Whereas when there are a whole community of sellers and many buyers for some item (say, a used video game console), the prices tend to change more smoothly and gradually, in smaller increments.