Wow, News to me. (Have owned/driven nothing but Saab's since 1988).
Do the scheduled maintenance and they'll pretty much run forever. Mine is seven years old and Mrs Scout's is eight. The ones we had prior to that were traded in at 11 and 12 years. Still running but requiring new tires, brakes, shocks, etc, etc, etc. The only reason they got traded-in was "Do we drop $3-5,000 on 11/12 year-old cars with 200K+ miles on them or trade/sell them and put that money toward the down payment on new ones with a warranty."
We still see Mrs Scout's 1988 900 occasionaly around town as it was initally sold to a local college student. Still running strong, but we're sure that it's had several owners since we sold it.
The only time any of the ones we've owned have "broken down" was when I got a flat tire after running over a piece of metal in the road.
Oh, and flood damage can mean anything from "Ma'am we found you car, it was 30 miles down stream from your house" to "The water came up high enough to get the carpet in the floorboards wet, so we replaced it."
1999 9-3 that runs great, 94K miles (roughly 10K per year) and I'd ask/check that the owner did the scheduled maintenance, then make him a offer.