I need your opnion. Would you go for this?

Right now I own a '97 Mercury Sable. I just bought it about 6 months ago for a pretty good deal. It's only got a 115,000 miles and fully loaded, leather, moon roof, CD, lumbar seats, the works. There is body damage on one of the front panels from a small accident the car had before I owned it. There are also a couple small dents in two of the doors. Now I have the opportunity to get an '89 Buick LeSabre for free. It's in essentially mint condition with only 55,000 miles and only needs new shock absorbers for repairs. It's got power windows/locks thats about it for extras. I know it hasn't been in an accident or abused because it was owned since it was new by my grandfather who no longer needs it. I'm concerned if I take the Buick because it's already 19 years old even though it has very low miles, it could still be as much of a risk to break down as my car which is only 11 years. So what would you do? Would you take the Buick, or p and keep the Sable?