Especially if it's salt water! Most of the damage will be to electrical components, computers, circuitry and sub-systems and salt water is absolutely the worst thing that can happen to an automobile. Seawater is highly corrosive to metals and will destroy everything in its path in due time. Even if the engine and transmission are undamaged, once water intrusion reaches the rocker panel and gets inside the vehicle the ECU (engine control unit) will be covered in salt water. It's toast!
Salt water is also a great conduit and hundred of people are injured as they reconnect a new battery to attempt to power up an automobile. Airbags can deploy without warning and fires can start spontaneously. Here is a great article on the impact a flood brand has on a vehicle's value.
DamageMAX buys flood vehicles anywhere and can make these vehicles and your headaches disappear.