The average for good quality fabric in one of the shops I go to in Belfast is around £9.50 which is almost $15 I think. I found a great shop in Wales who sell through the internet and even with postage the fabric is cheaper. I'm gathering up good quality cotton shirts just now, just £1 each... Also when Ikea has nice duvet covers on sale I have started to buy the odd one , they are just the right size for backing a quilt and I can use the other side as extra fabric for something else.