Relatively new on the fast food menu at Arby's here in St Louis, Mo, at least are the Roast Beef Gyro and Roast Beef Patty melt.
Arby's sent out coupons that I nearly threw away, until I noticed that they were $1 coupons! For $1, try the Gyro. Another $1 coupon for the Patty Melt and another $1 each coupon for the RoastBurger and Chicken Ranch something or other.
I opted to try the Gyro and the Patty Melt. (Lunch for $2.13, can't beat that!)

Arby's describes the sandwich as: Our gyro features Arby’s beef – roasted to perfection and freshly sliced on a warm, soft flatbread, topped with fresh lettuce, tomato, red onions, and traditional gyro sauce.
I found it to be nice and full of roast beefy goodness, and that the red onion, tomato and lettuce very nicely complimented the beef. The gyro sauce was also that nice cucumbery flavor that you expect from a Greek gyro sauce. And the flatbread held the components of the sandwich together very adequately. I have to say I was actually surprised at how good this sandwich was, as I don't hold the highest expectations for Arby's typically!

Next up, I tried the Patty Melt. The cardboard box it comes in promises cheesy crunchy goodness, but I didn't quite find as much of that as I would have hoped, unfortunately! Arby's describes this sandwich as: Our patty melt is made with oven-roasted, freshly sliced beef, piled high on toasted sourdough bread. Melted Swiss cheese and creamy Thousand Island dressing add a tantalizing finish to a great sandwich.
I didn't know what kind of bread the toasted "bun" was supposed to be, and by taste I would have guessed rye or a sourdough rye. Perhaps the Thousand Island dressing threw my taste buds off, but I don't really think so. They also added chopped red onions to this sandwich, which isn't on the corporate description. I could have done without them, frankly, but they weren't too awful. I think I'd just had enough red onion since I'd just eaten the gyro! The swiss cheese, however, seemed to be all on the last half of the sandwich, perhaps it's not a full slice or I didn't get a full slice on my sandwich.
Either way, there you have it--one person's take on trying the newer sandwiches at Arby's on $1 coupons. The Arby's here in St Louis metro let you pair up multiple coupons together, so you can bring home the trashy, filling, and cheap eats from Arby's very easily!