adidas via eBay offers its adidas Men's Adi-Ease Shoes in Red for $24 with free shipping. That's $3 under our October mention (of a different color option) and the lowest price we've seen for any Adi-Ease shoes. (It's also the best deal we could find now by $18.) They're available in select sizes from 6 to 13.
If you aren't using any of these three methods for significantly saving on laundry detergent, you are washing money down the drain.