I just bought some Stone Buhr bread flour from Safeway. 10lb bag was only $5.35 - a very nice price.
They also had a Safeway Organics 5lb flour on sale for less than $2.50 per bag.
Trader Joe's also stocks KA All purpose for $3.99 for 5lbs.
I could make pizza with the Stone Buhr or KABF and not tell any difference at all, I doubt that anyone else could either.