Flooding? I know of some older houses on that side of Eastern Lake which are built on concrete slabs, maybe four feet above the "typical" Lake level. They do get wet on the big storms. However, this house appears to be built at least one complete floor level above the ground. If we were hit with 25 foot storm surge, most of South Walton would likely be underwater. Personally, I think that price sounds like a steal, if I were looking for Lake living.
I'll add to Bobby J's thought, if you are scared of water, buy your house in Wyoming, not Florida. Florida is virtually surrounded by water.