Garb to be

Once the armor is done (or done enough for now) I want to make a linen shirt for Pennsic. Some links for on-line sellers of linen:

http://www.fashionfabricsclub.com/

http://www.denverfabrics.com/ ("Up to 5 swatches (3x4") for 1 cent each, each additional swatch $1 each." WTF? )

http://www.fabrics-store.com/

I priced linen at JoAnn Fabrics and it was around $14/yard. The sites above list linen for half that price. Can it really be that much cheaper to buy online?