lee Reloader Single Stage vs Lee Challenger Breech lock vs Lee Classic Cast

What are the main differences in these 3 Lee Single Stage Press.

Lee Reloader ($30)
Lee Challenger Breech lock ($50)
Lee Classic Cast ($100)

fairly big price difference in between them.

Thanks

get the breech lock. Use the breech lock bushings on all your dies and once set you don't have to reset them. I'm not sure why the cast is more, I don't care for cast.