IIRC, th last time I did a service, 2" EMT was $22/10', Fe (galv steel) RMC was $52/10', and 2" Al RMC was $32/10'.
Quite a difference! And yes, Al used to be about 30-50% more than steel. Now the proportions are reversed, but (unfortunately) without a drop in the price of Al!
Never seen thinwall Al, though...
[This message has been edited by DougW (edited 01-20-2005).]