Straight from GB News: https://ghostbustersnews.com/2021/09/29/screen-used-ghostbusters-proton-pack-from-2016-reboot-to-be-auctioned-off/
Looks like November you’ll have a chance to get your hands on a screen used pack!
Sweet! Hopefully Prop Store will put on a display at the IMAX in London like they’ve done in previous years, and thus granting the chance to grab reference photos. 
Interesting to see it’s got the proton stream element on the thrower as well… Guess maybe it’s a permanent feature rather than removable.
Love it. Want it. Can’t afford it.
Looks cool. Hope Jeff Shreck enjoys it. 
Hard to tell which it was since the sticker is gone but looks like a circular mark of where it used to be so could be Holtzmann’s.
If Jeff doesn’t get it, it’ll be a literal crime!
SONY is dumping basically all of the equipment made for the movie, a full set of suits for the girls, and some other fun stuff - There are also a few items from the OGB films.