Here's something that doesn't come around too often: a screen used mask from Scream! Furthermore, not only is it a mask used in the 1996 classic, but it is the infamous "Sidney Attack Mask" aka arguably the most recognizable mask in the entire franchise. The auction details can be found here.
Our good friend a frequent collaborator Nate Ragon posted a great video breakdown of the "Sidney Attack Mask" on his YouTube channel.