Best Choice Products via eBay offers its Best Choice Products Multi-Purpose Aluminum Folding Ladder, model no. SKY528, for $59.99 with free shipping. That's $5 below our June mention and the lowest total price we've seen. (Outside of other eBay sellers, it's a current best $18.) It can be used in seven different ways and features a weight capacity of up to 330 lbs.

Note: Although it's listed as an 11-foot ladder when fully extended, it's likely longer than that. Many listings for this model note it as 12.5 feet.