Here's my Big Agnes Insulated Air Core, size regular. Good condition except for a couple of small stains. Great piece of gear, but I upgraded to the Exped with more insulation.
$45 + shipping
https://www.bigagnes.com/Products/Detail/Pad/InsulatedAirCore
Review
http://www.backpackgeartest.org/reviews/Sleep%20Gear/Pads%20and%20Air%20Mattresses/Big%20Agnes%20Insulated%20Air%20Core/Owner%20Review%20by%20Ray%20Estrella/
Video review
Big Agnes Insulated Air Core Mattress
$45 + shipping
https://www.bigagnes.com/Products/Detail/Pad/InsulatedAirCore
Review
http://www.backpackgeartest.org/reviews/Sleep%20Gear/Pads%20and%20Air%20Mattresses/Big%20Agnes%20Insulated%20Air%20Core/Owner%20Review%20by%20Ray%20Estrella/
Video review
Big Agnes Insulated Air Core Mattress