Sears offers the Dorel Home Furnishings Twin Daybed in White, model no. WM6394W, for $179 with free shipping. (Amazon charges the same.) That's the lowest total price we could find by $51. It measures approximately 77" x 42" x 34". (Mattress and trundle bed are sold separately.)
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.