PC on Ghostly Staves

I plan on buying this staff:



But i have no idea what i should offer, so id like someone to point me in the right direction. (im pretty sure its between 80-100k+) but before i sink that much money into an item id like to make sure.

i believe i saw a few req9 or 10 curses gold inscribable ghostly staves on low end for b/o of 40k or so.. not sure though.

I've seen a few go that low too but think they were very undersold... as I've easily sold some for 60-100k+... curses req is a good one... 40-60k seems fair at least