If you aren't in a guild, maybe try checking with your local guilds to see if they do fabric sales. One of the guilds in my area has an annual sale where members donate fabric they don't want anymore, and it's sold off CHEAP by the pound. It's open to the general public - all the proceeds benefit the guild.
I love that sale, it's always right near my birthday so gives me an excuse to splurge. Not that a splurge costs much there. A lot of the fabric is really nice, too. And sometimes there's great old vintage fabrics up for grabs too. It's a fun event.
There is also a local charity shop that accepts only crafting items - a lot of local elderly folk turn their spouse's stash over to this shop, because all of the proceeds benefit local seniors. Another great place to find deals on fabric, if something like that exists near you.
We've got to be creative to find those deals!