With orders of $25 or more, Amazon offers the Finish All-in-1 Powerball 85-Count Mega-Pack for $7.25 with free shipping. That's $6 less than what you'd expect to pay in a local retail store. (For further comparison, the lowest price we've seen for a 90-pack has been $10.)

Note: This item is offered as part of Amazon's "add-on program" and can only be purchased with an order of $25 or more.