http://www.amazon.com/LUCID%C2%AE-Folding-Mattress-Perfect-Camping/dp/B00ENUIPYQ/ref=sr_1_fkmr0_1?s=home-garden&ie=UTF8&qid=1402702329&sr=1-1-fkmr0&keywords=LUCID%C2%AE+4%22+Folding+Foam+Mattress

Check out the above link to Amazon for product description and prices.

Selling 1 Twin size(39"X75") and 1 Full size(54"X75") foam mattresses, both 4.5" thick and firm to support your weight.
Bought at Amazon in Feb 2014 (Still has 2.5 years of warranty left)
I am selling the twin at $40(bought at $129.99) and the full at $55(bought at $169.99), both less than 1/3 of purchase prices.

Available for pick up on 16th Jun(Monday) from an oncampus address.