E65 2004 745i Accident History

I am looking to purchase a 2004 BMW 745i with $8000 in accident history. I 
got this info from carproof.com. It does not detail what has happened to
the 
car. I got an inspection on it and the BMW dealer stated that it looks to
be 
the rear end. I am getting a really good price on the car I just wanted to

know what you guys think. Is it really that hard to rack up 8g in damage
on 
the rear end of a 745i? Or do you think/guess this could be a major
problem 
in the future? Thanks any input would help.

- Andrew