This coupon is valid for one month of free rent. Minimum 3 month rental applies. Valid at any of our 3 locations including: Springfield, Lincoln & Beardstown, Illinois. Present this coupon to the leasing manager at time of rental. One coupon per customer. New customers only please. Expires May 31, 2012 *Offer valid on select sizes only. We reserve the right to extend or end the special offer at any time without notice. Storage Box Website Special Offer.