Picked up some metal from this place about 30 minutes outside of Raleigh called FoyMart. No tube, only sch 40 pipe, but their prices on plate, square, and rectangle tube are about half of everywhere else around Raleigh.
http://foymart.com/
just click on steel prices for a print out.
http://foymart.com/
just click on steel prices for a print out.