There are a few things that go into this:
We have a physical thrift store where we sell fabric and notions for $5 per pound, and offer bag sales and bins of free fabric - that’s how we started and where most of our items were sold in our first few years.
Our staff are paid a fair wage and in order to be worth the labor of photography and writing up an internet listing, a fabric needs to be pretty special, so initially, only our more expensive and rare items got listed online. It’s similar to what large thrift store chains do with collectable and valuable items that show up in their stores.
As time has gone on, we have increased our inventory, and that, combined with the global pandemic, has meant a shift in how our business is run. We still highlight our most special fabrics in weekly collections that go live every Friday at 10 CST. Those are generally our most expensive fabrics, although we still try to price lower than comparable fabrics would be in other stores! We also now list more inventory throughout the week. We try to bundle items that would not be worth the labor of listing individually. Our best bargains sell out fast!
Lastly, we are a little more focused on the sustainability aspect of using fabric that already exists rather than encouraging more production than is necessary by buying new. "A Sustainable Notion" just didn't have the same ring to it though .