I find that when a lesser quality fabric is offered, it is specified as such and also priced as such, so you know what you are getting. I have never been disappointed by purchases made from board members.
To find the classified section, go to the top of any page and click on the HOME tab. Then you will find yourself on the home page and it lists each category by title. Just scroll down, it's pretty near the bottom, till you find Items For Sale or Trade.