No, that wasn't a typing mistake. A weather vane has honestly sold at auction for more than six million dollars, and therefore we think it makes perfect sense to have a look on the roof of your house and any other property you might own to find out if there's one there. They used to be a common fixture on many buildings, but over the years they slowly fell out of fashion, and now we no longer build the kind of structures which would have space for a weather vane on the top. They're a lost art - and they attract the sort of value you'd associate with art, too.
Victorian-era weathervanes are very popular on eBay and at auction houses, where they routinely sell for over a thousand dollars. The more intricate and ornate the better, and the better the vintage, the bigger the price. The six-million-dollar weathervane, though, was a Native American design, and went at a private auction.