Why can't I download an older version of Pages from the App Store?

Is there any way to download an older version of Pages? Specifically, version 4.2?

Upgrading my OS from 10.6.8 is not an option, and I live overseas in a place where I'm completely unable to recieve disks for older iWorks through the mail. This is frustrating... the App should either be compatible or alternatively should keep older versions available, if not on the app store then on the website somewhere. I'm willing to pay Apple for an older version, but have yet to figure out how that's even an option.

Would love to know if there's a way to get Pages 4.2 that I've missed. Thanks