Since Manson is still among the living not much more that $150. It depends on if is signed artwork or whatever it is that Manson does in his considerable spare time. It may be worth more on artwork.
Anywhere between $1500 US., to $4000 US. depending on how rare it is, and if the signature is real, and not faked. It also depends on what document the signature is written on, whether it is common...
From what I have been able to turn up, the album must be inspected before a price can be determined. Look online for vinyl album appraisers and dealers. I would image this would be a somewhat rare...