Lowes offers First Alert 22 -Step Three-Story 375-lb Capacity Steel for $85 (reg $163) with free shipping.

Product Description:
The First Alert Three-Story Portable Fire Escape Ladder helps prepare you for fires and other emergencies by giving you a vital, dependable means of escape through a window. This 24-foot ladder can hold up to 375 pounds at a time. This durable emergency escape ladder features a steel and nylon construction. The fire safety ladder can be used on standard windowsills, can be easily stored under a bed or in a closet for easy access, and comes fully assembled.

• Fully assembled 24-foot fire escape ladder offers a dependable means of escape to safety from third story windows
• Durable steel and nylon construction can safely hold up to 375 pounds at a time
• Slip-resistant rungs and steel stabilizers provide a steady foothold
• Extra-wide hooks work with any windowsill measuring at least 20" wide, 32" high, and 6" to 13" deep
• Tested to ASTM standards