If you look closely at many of the redbacks, you can see the original black paint underneath. Once a tile is retired, and the retail ordering deadline has passed, the surplus inventory are painted over and sold at the sales. Alot of this stuff is retail grade and thats why most of them look next to perfect. There are ones that are clearly seconds, tinting, transfer mishaps, etc. As a collector, you're used to handling them gingerly, but at the studio, they're piled in heaps on top of each other. Yikes.