I doubt there's a specific list, since it's easy to test for yourself, because all items do have tags for discardable and tradeable. And to be stealable, it would need to be both those things (and thus not a quest item or gift item). Which brings us to the only exception: the Amulet of Yendor.
To give an example, I have this alias set so I can run it every once in a while to saveguard my stuff, it even makes me a nice list (and yes, I don't really care about my Amulet of Yendor(s)):
Code:
pvpcheck => ashq item [int] list; foreach it in $items[] { if (item_amount(it)+closet_amount(it) > 0 && [b][u]it.tradeable && it.discardable[/u][/b] ) { if ( historical_age(it) > 14) { if ( mall_price(it)>50000) list[list.count()] = it;} else if ( historical_price(it) > 50000) list[list.count()] = it;}} sort list by historical_price(value); foreach it in list { print(historical_price(list[it])+" : "+list[it]); put_closet(item_amount(list[it]),list[it]); }