"Redhat and mandrake are the easiest to install, but the hardest to get."
Go to:
Linux Central You can get the Mandrake CD set for $5.95 + shipping. They also have CDs for just about any distro you could want. They don't, however, offer any documentation. You can get that seperately without too much trouble.
You can also try:
Mandrake Linux Here, you can get the Mandrake boxed set, complete with CDs, documentation, and some freebies: mouse pad, Mandrake stickers and decals, and also tech support. You can also find sources for Iso downloads, however, that's more trouble than it's worth unless you have a fast connection. It would take a dog's age over dial-up.