From the info in the advert its got service history which if its full is a good thing in at least the owner looked after it. Ask for a look at the V5 get the previous owners address and contact him about what he towed and are there any problems. If you get to test drive it on your own go somewhere quiet stick it in first gear foot on the brake and clutch full down then fast off the clutch pedal. The engine should stop immediatley if it runs on a bit the cluch is worn.
This might be worth a read
http://www.autotrader.co.uk/CARS/buy...cle_checks.jsp