Cant really help comparison wise - but i bought a 2003 Fiesta TDCI in February - i have put over 10,000 miles on it since then and it has been an absolute dream to run!! I bought it on 97,000 and now its near 108,000. I would say that if you can find a diesel fiesta from 52 - 04 plate and less than 100,000 miles then it should set you in good stead. From when i was looking, the prices seemed to stay over £2000 even if the mileage was well over 100,000. For a price between £2500-£2800 you should be able to find a decent second hand motor :-)