HELP NEEDED!!!!!

All,
I am after some advise on a car I want to buy, however at 72000 miles and 12yrs old, I need to know whether it is worth the £4500 currently being asked for.
I have seen a Smart Four for Brabus on sale, it has a BHP of 174 and can do 0-62 in 6.9 Seconds. It has got a full Merc service history.
I haven't got the money to really think about buying another car within the next 3 years so want to know anyone's thoughts on reliability.
I am after some advise on a car I want to buy, however at 72000 miles and 12yrs old, I need to know whether it is worth the £4500 currently being asked for.
I have seen a Smart Four for Brabus on sale, it has a BHP of 174 and can do 0-62 in 6.9 Seconds. It has got a full Merc service history.
I haven't got the money to really think about buying another car within the next 3 years so want to know anyone's thoughts on reliability.