Sports Authority takes up to 80% off a selection of items during its Outlet Sale. Shipping starts at $6.99, but most orders of $49 or more qualify for free shipping. (Clothing and shoe orders also receive free shipping; some oversize items incur additional fees.) A couple best bets:
Walmart offers the Everlast 100-lb. Heavy Bag Kit, model no. BG4000, for $38.64 with free shipping. That's tied with our mention from three weeks ago as the best price we've seen. (It's a current price low by $18.) The kit includes a 100-lb. bag, hand wraps, and boxing gloves.