The World's Most Valuable Collector's Items

11. Nokia 3310 Ti Royal Diamond Leaders

Manufacturer: Nokia/HMD Global/Caviar
original price: US$ 25,000*
Value today: TBD 

We already know that the classic Nokia 3310s can fetch good money, but did you know that there are some versions that can pay off the rest of your mortgage? In 2017, a Russian company called Caviar released a diamond-encrusted version that featured world leaders.

Worth over $ 25,000, the luxury phone might not have all the bells and whistles that most modern smartphones have, but it's a collector's dream. Chances are it will only increase in value, with homeowners potentially sitting on a sizeable nest egg.