You can't sell items of a set jet, it seems it's possible to sell it after a act change.
The chemist sets, candles, jugs, all those things are just decorative stuf and you can drag them allong and decorate a house you occupie.
If you click on something it wil disapear if you need it or can sell it.
there are a few exeptions:
stuf you need for quests (like letters with proof, some herbs or potions ect etc
The teleporter stones and dolls
greetz
xd
