1950 B series $10 bills with a star in the serial number are relatively valuable and can command high prices among collectors. The star indicates that the bill was part of a special series issued in 1942 to replace wartime notes used during World War II. Due to their limited production and historical significance, these bills are considered rare and are sought after by numismatists. The value of a particular 1950 B series $10 bill with a star can vary depending on its condition, rarity, and market demand. However, in general, these banknotes can be worth hundreds or even thousands of dollars, making them a desirable item for collectors and enthusiasts of American currency.