If they are inscribed with a date of "1100 BC", I would demand further varification as to their authenticity before speding a lot of money on Ebay for them!
They'd make great bookends! I'll put them with my Virgin-Mary sandwich!
Which brings up the interesting question, if something is dated at the time it is created, how do we figure out when it was?
Our system is based on a historic event; it is reasonable to assume that others may be, as well as on cycles of astronomical observations.
Like I said, interesting...