Used to buy and sell these about a years ago, stay away from the Auto's or the Auto-clutch they are aweful, and dont last, the Longback is also the one you want to go for as the other had no boot space whatsoever.
Also look out for the cars history, some of them are owned by a leese company called Mobility, these are the best catches, because they are low mileage literally been used to take disabled people to the shops and back, maybe one or two long distances but no hard driving, bought one for my gran, and she hasnt had a problem with it since she got it. Reliable. Im not going to get into the performance because it has none, however i would recomend the A140 as its nippy and good on fuel.
If you need any further info, just Pm me, i studied them for a while before i went out and bought a few.