I probably won't be much help because I buy yardage, not FQ cuts. I stock up on RK Kona or Moda Bella solids when I see them on sale or have coupons for 50% off, and I buy several different colors because I use lots of solids. Otherwise, I have learned not to just buy random fabrics to build stash as it seems I don't use them. But I would not consider $2 or more per FQ (including shipping) a huge bargain. Instead my stash has been built just from leftovers from fabrics purchased for specific projects. When these get too large, I hunt for a scrappy pattern or two and try to make a few charity quilts. But, I have bought fabrics on eBay and didn't have any problems---it just seems that I can find better deals from local or online fabric stores (like fabric.com or thousandsofbolts.com).