Where can I buy a Bianchi Pista Concept? I would like to buy a Bianchi Pista Concept 2005...2009 like this one:

http://velospace.org/node/24912 

Where can I find this bike in London, UK? And what should I check before buy it?

Also, How much should I expect to pay for? 

Thank you.
This is only a partial answer, but the Bianchi dealer locater shows several dealers in London. I'd call around and find out what the ballpark is in terms of cost.