What does a typical case trimmer cost?

Is there anything else missing out of the kit that I'll need other than the dies and shell holders? I'm trying to comparison shop.

Is there any reason that I shouldn't get the Lyman press. It seems more complete for only $20 more. Is the Rock Chucker that much better of a press that I should get it and fork over the extra cash for the case trimmer?

Thanks

Tom