Especially as BA brought them for a pound each.
Actually Woody my fellow westcountry'un, thats not quite right:
From British Airways themselves:
http://www.britishairways.com/concorde/faq.html#6Did the British Government give Concorde to British Airways for one pound UK sterling?Claims that we paid GBP1.00 (UK Sterling) for the Concorde fleet or that it was given in trust are wrong.
British Airways predecessors paid the manufacturers more than GBP155 million for the Concorde fleet (source:1977/78 Report and Accounts) and over the following 27 years of operation British Airways has invested more than GBP1 billion in the fleet.
The Concorde book value was written down to nil in 1979 and subsequent capital investments to 1983 were also written off to nil. (source: 1987 Prospectus on British Airways privatisation)
In March 1984 the government ended its involvement with Concorde when British Airways assumed full responsibility for Concorde support costs. British Airways Board paid GBP16.5 million to acquire the government's stock of spare parts and was released from the profit share scheme under which the government collected 80 per cent of Concorde operating surpluses.
In 1987 the government privatised British Airways and collected more than GBP900 million for selling its interest in the airline, including Concorde.

TSC.