At participating Arby's restaurants, buy one New York Style Reuben Sandwich and get a second for free via this printable coupon. (Enter your name to get the coupon.) That's the best freebie we've seen from Arby's since December, when we saw a buy one get one free offer for classic sandwiches. Limit one per customer. Although you can claim your coupon now, it can only be used from March 15 to March 17.