In the market for a 10 year old diesel must mean you've got a very big annual mileage to get through to risk the turbo, dpf and/or dmf potential failures versus the worse mpg of a manual, normally asprated petrol.
The mpg gain will be a big one particularly round town. Diesels also run reasonably ecomically even form cold. There's a reason why taxis are all diesel!!
Many diesels at that age will be pretty basic IDI jobs. Provided oil and timing belt changes have been done on time then, like my 135k/8yo Berlingo they just go on. I also ran a 2000/X Xantia HDi to 150k. Apart from a cambelt problem at 70k due to garage ignoring my request to change additional components when renewing belt and occasional tendency to wear out induction circuit hoses the engine was a peach. Went to auction as a runner with just a slight oil leak. It was mechanical wear/tear that did for it.
More complex direct injection engines started to come in from around 1998. The DW (HDi) unit fitted to numerous Peugeot, Citroen and Ford vehicles has a well earned reputation for being trouble free even at galactic mileage (subject the caveat about servicing again). No doubt VW, GM and japanese products are same.
As others said DPF was very much in its infancy then and modelas thus equipped can easily be sidetepped.
Edited by Bromptonaut on 23/09/2013 at 14:59
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