I see them constantly and chase them near and far. Infact my EC character has been in from with a wizard or sage almost perpetually for the last three weeks!
Incidentally, where the realm to get the best price for some >10+ skull bonus artifacts? I have trading and oratory.
Both are relatively cheap. You want to sell ones most people can't get to 100% with like swordfighting and jousting or spellcasting.
I met 1 sage in the past month... they are pretty good at hiding.