I was looking up the 2008 bumblebee & he's the same price as voyager prime. On the other hand though, the smallest of the movie voyagers, Blackout is up to 44 bucks.
Those do not come directly from Amazon. They come from other people or businesses. Kind of like an ebay buy it now option more or less.
Some of the most expensive prices come from ToyWiz(they charge almost 4 times as much for deluxes! And they still say their prices are competitive!)