20 gallon tote on clearance at Staples for $2. Comes in black and white, white looks better. These are decent quality and not super cheap like some of these cheapies can be. It's been on clearance for about a week but many stores still have it. Time to give SDers a shot at it.
Here's the online link for reference and to check stock at your local store. It's $7 online but should be $2 in store on clearance. If you don't believe me, check the reviews. They will confirm the $2 price in store.