I saw this on Ebay, it sold for somewhere around 500 Euros or so. I was tempted to bid on it because it is in nice shape and has great restoration potential!
I'm sure most of you have already seen the upcoming Hermann Historica auction online.
There is a really nice example of a 1842 pickelhaube.
https://www.hermann-historica.de/en/auctions/lot/id/1188733
Here's another beauty that went in no time at all from AgeOfKings...beautiful piece. I hope it went to a forum member !
https://ageofkingsmilitaria.com/1005-prussian-model-1842-infantry-reserve-officers-pickelhaube