Amazon offers Prime members the Bunchems Alive Motorized Action Pack, model no. 6027868, for $8.49 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping costs $6.43.) That's the lowest total price we could find by $4. It includes a Bunchems motorized stick'em ball, 200 blue Bunchems, 30 green Bunchems, 60 purple Bunchems, five white Bunchems, five black Bunchems, 13 accessories, and a guide book.

Update: The price has increased to $8.52.