Woot offers Pro-Lift 300 Lbs Mechanic Creeper 2 in 1 Foldable Creeper Seat for $42.99 (orig. $71.99). Free shipping for Prime Members.

Product Description:
Pro-LifT 300 Lbs Mechanic 2 in 1 Foldable Creeper Seat
It is designed to be folded in a "Z" shape for use as a mechanics seat or unfolded for use as a mechanic creeper. Its thick padded bed, it gives you the extra comfort while getting your job done.
Pro-Lift C-2036H Creeper features 6 swivel casters. They provide users with full mobility and ease of use to get under tight areas.
In addition, Pro Lift C-2036H Creepers is built with a heavy-duty frame. It supports up to 300 lbs capacity.
Creates a Comfortable Base for Easy Access and Movement During the Maintenance Tasks

• Easily converted from creeper to seat for your maintenance convenience
• Thick padded cushions create a comfortable base for easy access and movement during your maintenance tasks
• 6 swivel casters for easy maneuverability. Vinyl padded seat and headrest
• 300 pounds weight capacity
• Easily retractable pin to change seat
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  1 Year Manufacturer Warranty