Not sure if this is a joke, a selling gimmick or serious, but this ad showed up on the Norwegian classifieds site finn.no. It looks like just a regular guitar for sale until you read the title:
"Epiphone Goth Explorer w/gig bag for sale because it’s posessed"
And it continues:
"Since yesterday, 6/6 at around 6 AM, there have been some evil tones coming from the guitar. The E-string is constantly chanting something that may sound like 'Ave Satani'.
I therefore do not dare to keep the guitar, and I’m hoping someone who is more acquainted with this culture will give it a more suitable home."
The seller doesn't name a price, but we can assume it would go for slightly less than your soul.