Open Season

THROUGHOUT THE COLLECTOR-CAR HOBBY, LESS OFTEN MEANS MORE: Less sheetmetal, in the form of a folding fabric roof, means more desirability and, typically, dollars. In the year that Hemmings Auctions has been active, some of the most-followed, most-commented-upon sales have been open-top vehicles. While you might think the popularity of those vehicles would be dependent on the season, their listings have generated a buzz, year-round.

Of course, solid-roof cars