Your defunct smartphone could be your next great investment. An original iPhone from 2007 sold at auction for $190,000, almost double what experts expected. The phone was sealed, unopened, and has never been used. It's particularly valuable because only a few of these phones were ever manufactured. The original iPhone had only four gigabytes of storage, but Apple discontinued it after just a few short months in favor of larger eight and 16-gigabyte models.
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