Sears offers the Signature Sleep Folding Metal Guest Bed with 30" Mattress, model no. 4054909, for $89.99 with free shipping. Plus, Shop Your Way Rewards members receive around $21 in SYWR Credit. (Not a member? It's free to join.) If you'll use the credit, that's $61 off list price, $16 under our mention from July, and the best deal we could find. It can support up to 150 lbs. and includes a storage bag.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.