you need to get HK47 to do the quest I think.
Oh, always play LS for the tuskens, then you can get the good stuff...
after doing everything and listening to thei story, temporarily giving them the dragon pearl. THEN you can deliberately open up a basket behind the story teller and piss everyone off, and KILL THEM ALL!!!
Oh, not only do you get your dragon pearl back, but the story teller have another unique staff!!!
To sell headplates you go to the hunter's bar and sell it to the guy who buys trophys.