They're cool items. Skulls would be best in a basket or box somewhere special, as they can't be locked down directly, sadly. I have a Torso of Shaft in a wooden box of exceptional quality, on a double exceptional table with a Whispering Rose from Shaft. That's actually the only named piece I have ever gotten my hands on, so not sure on the prices either, but skulls would be nice if someone wanted a collection of 8-9 for a guillotine or something.