Depends who the former owner was.
My mams car is 7 year old and has 26k. Hardly uses it.
Check for signs of wear and tear on the seats, pedals etc. Does it look like its had an easy life?
Check the service history. If it hasnt got any, Id walk away. Lot of money can be thrown at older cars just to find other things keep going wrong and in the end theyre not worth it.
Put it this way my first car was a K reg Clio which in 99 was 7 year old. I spent £3k on the car and over the 4 years I had it, £2k on repairs never mind servicing.
I traded it in for £700 when it needed £400 worth of work for the mot but I just had lost all faith in it. I bought a VTS for £6000 and have had it two years. Ive spent around £100 in repair bills.
Like I say, check the history and try to find out more about the previous owner.