6PM has Old Gringo Ninna on sale for $144.09. You save 60%. Was $360.23 Old Gringo Yippee Ki Yay Collection is the fun flirty side of Old Gringo. This collection is a great place to start for those who are just beginning their love affair with cowboy boots. It is a handmade boot, made of quality materials with just a few less embellishments and a simpler design.