Hopefully after two years they have their four sabre cat teeth, don't go hunting for the cats inside dungeons though they don't respawn and can mess up the Companions Animal Extermination quest.
The same seems to happen with small antlers, flawless sapphires (luckily there are sapphire veins in Solstheim). And some other rare items as well, although the sabre cat teeth has been the hardest. Oh, and the sabre cat snow pelt, just spent days trying to find one *sigh*
I steal the flawless sapphire from the Inner Sanctum of Dibella's Temple in Markarth. They respawn so you can always go back. I also just collect the rarer gems like diamonds, emeralds and sapphires in case I ever need them.
Recently found out sabre cat teeth will not be sold (or bought) by alchemists due to a bug, unless you use the unofficial patch on PC which fixes it. Like the wiki page says snowy sabre cats can be found around Windhelm and Winterhold.
Near 10yrs in Skyrim....so many of us dragonborns still search for the saber’s teeth. The last of the great quests in Skyrim.