Step 1: Supplies
1/4 in steel sheet metal
three washers
bolt
lock nut (or a regular)
tools;
arc welder
plasma torch
argon
compressor
welding protection
wrench
grinder
sharpie

PDF Downloads
As a Pro member, you will gain access to download any Instructable in the PDF format.
You also have the ability to customize your PDF download.
Or the blacksmith's secret weapon-vice-grips : )
In the mean time, your iron has burned away as you try to start up the plasma welder...
you can make a simple one out of on old car wheel and some rebar...
http://www.forgemonkeys.com/
My anvil came from from Thak.ca, which was good for me because I'm in canada, so the shipping ended up being only about $50 for 110 kg anvil.
I would recommend finding a dealer who is at least local to your country, to save on shipping. And also if they are close enough that you can pay them a visit and check out their products before you buy, that is a very good idea.
Also, never buy an anvil from china. Even a little jewelry one. I've heard horror stories about chinese made anvils cracking open, revealing sand or lead inside...