Oversize Folding Chairs - $5 YMMV @ Home Depot (normally $19.95)
Brickseek shows tons of these on clearance at alot of my local Home Depots
Found these outside at my local Home Depot... there were 4 boxes of them. They had both red and blue colors. I pulled one out and unfolded and it felt really solid. I think it's a great deal if you can find them.
Model #: AC2210-2
Sku #: 1002075996
Internet #: 300168381