This is partially credited to Lord, thanks.
Steel Bars
What you do is you raise 100k. I don't care however you do it, just do so. When you do, spend every
penny GP on coal and iron. Make absolutely SURE you have 2x the amount of coal as iron (you need 2 coal and 1 iron to make a steel bar. Next, you go to Al-Kharid. This is the best F2P place. You can prove me wrong if there's a better P2P place.
Once you smith your 300 or so bars you should get (today's iron prices are
everywhere!), you should just about double your money to 200k once you sell them. Spend that moolah and go at it again. Smith the bars, then sell them for
400k. Spend that,
800k. Then, you spend 100k of that and...
VoĆla, 1m.
This is how I just got my rune platelegs (G), and I'll hopefully be getting the full set sometime in early 2009, I hope.