Robert Houdin Mystery Clock for Sale

I just saw on eBay a Robert Houdini Mystery Clock. I've actually seen several of them in real life, but I can't recall ever seeing one up for sale. It has a price tag of $30,000 which is pocket change to my most of my readers (ok, maybe not most).

The link to the item is http://www.ebay.com/itm/JEAN-EUGENE-ROBERT-HOUDIN-GLASS-COLUMN-MYSTERY-CLOCK-CA-1870S-RARE-/230958035789

It's being sold by MAGICINVESTMENTS which is Mario Carrandi's ebay store. By the way, he also has a beautiful three sheet Thurston poster for sale http://www.ebay.com/itm/ORIGINAL-POSTER-THURSTON-3-SHEET-PORTRAIT-/261139862934?pt=LH_DefaultDomain_0&hash=item3ccd261596