The dealer gets that sale, plus a "certified preowned" used car to sell that could yield more profit than many new car transactions.

WSJ: That Car in the Driveway Is Now Worth More

One otherwise comparable preowned car may have logged an excessive number of miles than another or may have been largely neglected by its owner.

FORBES: The Most-Reliable Used Cars

There are lots of theories as to why but the one we subscribe to is that there are very few husbands who are willing to risk the wrath of a disappointed wife by buying her a preowned watch.

FORBES: Watches Worth The Most To Sell

On the recommendation of several British fashion editors, I visited Vestiaire Collective, the Paris-based resale (translation: the clothes are preowned) site that launched in the U.K. last spring and now ships to the U.S. The selection is thoroughly high-end (celebrities Sophie Dahl and Rachel Weisz have donated goods), and each piece is vetted by in-house specialists who are trained to weed out fakes.

WSJ: The Fashion Piece That Got Away