when you consider a brand new fiesta with decent spec will cost 17k...(only 125bhp) If I was in the market for a 17k car, a fiesta would be the last thing on my list.
reference: http://www.bbc.co.uk/iplayer/episode/b03wc9v7/Top_Gear_Series_21_Episode_3/
That was a misleading figure - it is the list price which nobody ever pays for a Ford and secondly it is the most expensive trim level.
If you really wanted a 125 PS Titanium X a decent broker would sell you one for closer to £14k.