I am back from Boston and I bring Lore!
Although Naga Sadow met his demise on Yavin IV, his tomb with all of its dark artifacts lies in the Valley of the Dark Lords.
This was something that bugged me early on, especially since in the Warrior storyline it seems like there's an actual body with Sadow's armor in the tomb. But since the Clone Wars gave Darth Bane
a tomb there, I've just come to terms with the idea that any Sith Lord worth the name is gonna have sycophants who're gonna get his body to Korriban... for some reason.