damn they cost a lot don't they have some cheap one?
Yes monitor stands are not cheap and the Good ones like ergotron while expensive are worth every penny. But I looked at what you want again and it seems you don't not want a monitor arm but just a stand that allows you to move the monitor up and down and change the tilt and maybe turn it left to right. Take a look at this one
Neo-Flex LCD Stand that is what I have at work and it does the job and it is cheaper ($40 at provantage). But before you go out and buy one make sure to read the notes about mid way down the spec page about putting 24" monitors on it (basicly rotation may or may not work becuase you can't lift the monitor high enough to clear the base to rotate it). Another option which Ergotron will be releasing in September is the
Neo-Flex Extend LCD Arm it is listed as being cheaper than the LX by $40. I bet thy have added this one to address the short comings of the Neo-Flex LCD Arm which really does not handle 24" well at all.
EDIT: Forgot to add when you price monitors take a close look at those that offer an adjustable stand and you will note that they are $100 more than the same monitor with out an adjustable stand.