They're Conquest Items that can be purchased for 5000 Conquest points by any Rank 10 characters.
They will give Signet to you(if you're from that nation) or anyone in your party(from that nation). Is that worth 50k? If you really want that capability, buying them from Rank 10 players or getting rank 10 yourself and purchasing are the only way to obtain them.
http://www.google.com/search?hl=en&q=Kingdom+Signet+Staff%2BFFXI&btnG=Google+Search wrote:
Final Fantasy XI Server: Cerberus Server - www.cannotlinkto
7 Items & 21 Accounts for Final Fantasy XI on Cerberus Server. Search for: Server:
Sort by: ... Price: $20.00, Kingdom Signet Staff (Full Charges). Price: $20.00, ...
www.cannotlinkto/MG/cart.asp?op=add& type=cur&id=6000&srv=93&loc=%2FMG%2Fsearch.asp%3F... - 72k - Supplemental Result - Cached - Similar pages
Found that at bottom of first page doing a Google Search to see if I could find any more info on them for you. o.o
Do crazy people actually buy them for $20 each?... LOL
Insane, I tell you.