(Before COVID) At a local group's annual fabric/yarn fundraiser the UFO table has been my first target! Finding a set of slightly unequal blocks, or orphan leftover blocks, or part of a series or BOM quilt ... gives me fodder for the next few charity quilts I make. Here's hoping they get to hold it next year -- it should be twice as big after this year's was cancelled!
I have also bought gently used 100% cotton men's shirts at thrift shop sales. The back of a Large shirt is bigger than a fat quarter!