Ebay offers Bissell Smart Details Lightweight Swivel Mop for $9.99 (orig. $22.99) with free shipping.

Product Description:
The Glide&Shine® Lightweight Mop is easy-to-use and has a flat design so you can easily reach under appliances and furniture.  The handle is also jointed to get even further into hard-to-reach areas.  The mop head can be pulled up into the water-wringing attachment to dry the pad during mopping, and also features grips that hold disposable cloths in place.   

• Versatile. Use damp for mopping, dry for dusting or with disposable cloths.
• Jointed handle allows for easy cleaning under furniture.
• Washable microfiber pad. Cleans without Chemicals.
• Swivels and rotates 360° to get in tight spaces.
• Flat design. Great for cleaning under appliances.