I have been to this fabric store twice, and I just love it. It is called M&L Fabrics in Buena Park, CA (right next to Knott's Berry Farm). It is the largest fabric store I have ever seen. They have thousands of bolts of fabric plus row upon row of shelves stuffed with folded fabric. The folded fabric is about $1.98 to $2.98 a yard. Their flannel is $2.79/yard. They also had brand name fabric for $7.00/yd and up. I went absolutely nuts. I planned ahead of time so I had patterns and fabric pieces to match up. It is over 200 miles for me to drive, but I plan to do it at least once a year. The fabric is all good quality cotton (michael miller, etc.).
Here is a list of what I bought (pictures to follow):
16.25 yards of flannel at $2.79/yd
30 yards of folded fabric at $1.98/yd
10 yards of bolt fabric at $2.98/yd
1 yd bolt fabric at $2.89/yd
4 yd at $2.49/yd