I buy from Walmart, Joannes and LQS. I do not buy very much from my LQS. Fabric is usually $8-$14 per yard. So it has to be something I REALLY love. If shopping at Walmart or Joannes be sure to open up the fabric, hold it to the light and pet it. If you like it buy it. You can buy beautiful fabric at both places and honestly I have not had a problem. Watch when Joannes has their clearance fabric for an additional half off. You can get their $8-$9 fabric for $2.50. Great for pieced backing.
(Just bought 30 yards and with extra savings coupons spent less than $50.)