Walmart with Tzumi Electronics has the FitRx Punch H2O 4-Ft Water-Filled Heavy Punching Bag (216 pounds) for $50 with free shipping. Includes 4 heavy-duty nylon straps and metal D-rings for hanging.  Also on sale:

• FitRX Boxing Gloves for $15 in 3 weight options
• FitRx SmartRack Dumbbell Stand (supports 220lbs) for $50