Purples are very tough to keep, I went through probably 15 purples until I was able to keep a pair. Even then, they are a tough to keep
My oldest tile which is the "yellow spot tilefish" I have had for 3 years, and in all these years of fish keeping I have never seen on at any LFS, any online store, just the one I have, and. Have tried looking for one, never seen one.
By the way don't ever spend ur money on flashing tiles, they never make it, never ever make it. Plus they only flash when in stress lol