Patek Phillipe are amongst the finest timepieces in the world and the Tourbillon is a work of genius http://en.wikipedia.org/wiki/Tourbillon.
If I had the money I would buy one.
However, the person selling this can't spell 'Tourbillon', which is a little worrying.
Anyone who buys a Patek Phillipe from Ebay deserves to be ripped off IMO.