They may still make 'Power Rangers' TV shows and toys in the current day, but nothing will ever top the pop-culture phenomenon that the show was when it was first broadcast back in the 1990s. The adventures of Billy, Jason, Kimberley, Zack, Tommy, and Trinny captured the hearts of a generation of children, who persuaded their parents to buy them the full range of toys and products. They'll have been played with for a while, and then forgotten about and abandoned as all toys are in the end. If you had the toys - or you were one of the parents who was badgered into paying for them - you might be able to get your money back now.
The specific toy you're looking for is the Lost Galaxy Deluxe Gold Megazord, which is the rarest of all of them, and can command a price of $1,400 on its own. Full sets of the Power Rangers can still attract several hundred dollars, so it's worth finding out what yours might go for, too.